Return time to end of next day












1















I have two columns: Start_Date and End_Date.



The task is to return a time to end of next day (using T-SQL, SSMS 14.0).



For example:



Start_Date = '2018-11-21 23:40:00'          End_Date = '2018-11-23 02:40:00'


The query should return 3 rows:



0 hour 20 min -- time between 2018-11-21 23:40:00 and 2018-11-22 00:00:00
24 hour 0 min -- time between 2018-11-22 00:00:00 and 2018-11-23 00:00:00
2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00


I suppose it can be implemented using the cursor or recursive CTE.










share|improve this question


















  • 1





    The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

    – ViKiNG
    Nov 21 '18 at 20:34











  • @ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

    – Valentyn
    Nov 21 '18 at 20:44






  • 2





    @HimanshuAhuja Did you see Oracle tag there?

    – Sami
    Nov 21 '18 at 21:16






  • 1





    @HimanshuAhuja From where did you get rownum?

    – Sami
    Nov 21 '18 at 21:33






  • 1





    @HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

    – Sami
    Nov 21 '18 at 21:45
















1















I have two columns: Start_Date and End_Date.



The task is to return a time to end of next day (using T-SQL, SSMS 14.0).



For example:



Start_Date = '2018-11-21 23:40:00'          End_Date = '2018-11-23 02:40:00'


The query should return 3 rows:



0 hour 20 min -- time between 2018-11-21 23:40:00 and 2018-11-22 00:00:00
24 hour 0 min -- time between 2018-11-22 00:00:00 and 2018-11-23 00:00:00
2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00


I suppose it can be implemented using the cursor or recursive CTE.










share|improve this question


















  • 1





    The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

    – ViKiNG
    Nov 21 '18 at 20:34











  • @ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

    – Valentyn
    Nov 21 '18 at 20:44






  • 2





    @HimanshuAhuja Did you see Oracle tag there?

    – Sami
    Nov 21 '18 at 21:16






  • 1





    @HimanshuAhuja From where did you get rownum?

    – Sami
    Nov 21 '18 at 21:33






  • 1





    @HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

    – Sami
    Nov 21 '18 at 21:45














1












1








1








I have two columns: Start_Date and End_Date.



The task is to return a time to end of next day (using T-SQL, SSMS 14.0).



For example:



Start_Date = '2018-11-21 23:40:00'          End_Date = '2018-11-23 02:40:00'


The query should return 3 rows:



0 hour 20 min -- time between 2018-11-21 23:40:00 and 2018-11-22 00:00:00
24 hour 0 min -- time between 2018-11-22 00:00:00 and 2018-11-23 00:00:00
2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00


I suppose it can be implemented using the cursor or recursive CTE.










share|improve this question














I have two columns: Start_Date and End_Date.



The task is to return a time to end of next day (using T-SQL, SSMS 14.0).



For example:



Start_Date = '2018-11-21 23:40:00'          End_Date = '2018-11-23 02:40:00'


The query should return 3 rows:



0 hour 20 min -- time between 2018-11-21 23:40:00 and 2018-11-22 00:00:00
24 hour 0 min -- time between 2018-11-22 00:00:00 and 2018-11-23 00:00:00
2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00


I suppose it can be implemented using the cursor or recursive CTE.







sql sql-server tsql






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 21 '18 at 20:28









ValentynValentyn

469




469








  • 1





    The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

    – ViKiNG
    Nov 21 '18 at 20:34











  • @ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

    – Valentyn
    Nov 21 '18 at 20:44






  • 2





    @HimanshuAhuja Did you see Oracle tag there?

    – Sami
    Nov 21 '18 at 21:16






  • 1





    @HimanshuAhuja From where did you get rownum?

    – Sami
    Nov 21 '18 at 21:33






  • 1





    @HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

    – Sami
    Nov 21 '18 at 21:45














  • 1





    The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

    – ViKiNG
    Nov 21 '18 at 20:34











  • @ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

    – Valentyn
    Nov 21 '18 at 20:44






  • 2





    @HimanshuAhuja Did you see Oracle tag there?

    – Sami
    Nov 21 '18 at 21:16






  • 1





    @HimanshuAhuja From where did you get rownum?

    – Sami
    Nov 21 '18 at 21:33






  • 1





    @HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

    – Sami
    Nov 21 '18 at 21:45








1




1





The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

– ViKiNG
Nov 21 '18 at 20:34





The task is not hard but probably you need to explain more like what is the logic? and why it can't be done?

– ViKiNG
Nov 21 '18 at 20:34













@ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

– Valentyn
Nov 21 '18 at 20:44





@ViKiNG Because I have no idea how to remove time (set 00:00:00 if to say correctly) for next days

– Valentyn
Nov 21 '18 at 20:44




2




2





@HimanshuAhuja Did you see Oracle tag there?

– Sami
Nov 21 '18 at 21:16





@HimanshuAhuja Did you see Oracle tag there?

– Sami
Nov 21 '18 at 21:16




1




1





@HimanshuAhuja From where did you get rownum?

– Sami
Nov 21 '18 at 21:33





@HimanshuAhuja From where did you get rownum?

– Sami
Nov 21 '18 at 21:33




1




1





@HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

– Sami
Nov 21 '18 at 21:45





@HimanshuAhuja Simply, that won't return 3 rows as OP wanted, and it won't work anyway.

– Sami
Nov 21 '18 at 21:45












3 Answers
3






active

oldest

votes


















1














Yes, CTE can be used with contribution of DATEDIFF and DATEADD functions together as :



CREATE VIEW DAYS AS
WITH CTE AS (
SELECT 1 as nr
UNION ALL
SELECT nr+1
FROM CTE
WHERE nr <= DATEDIFF( day, CONVERT(date, '2018-11-21 23:40:00'),
CONVERT(date, '2018-11-23 02:40:00') )
)
SELECT
DATEDIFF(
minute,
(case when nr > 1 then
DATEADD ( day , nr - 1 , CONVERT(date, '2018-11-21 23:40:00') )
else
DATEADD ( day , nr - 1 , CONVERT(datetime, '2018-11-21 23:40:00'))
end),

(case when nr < 3 then
DATEADD ( day , nr , CONVERT(date, '2018-11-21 23:40:00') )
else
DATEADD ( day , nr - 3, CONVERT(datetime, '2018-11-23 02:40:00'))
end)
) as time_diff
FROM CTE;

SELECT cast(time_diff/60 as varchar) + ' hours '
+ cast(time_diff % 60 as varchar) + ' minutes' as "Time Difference" FROM DAYS;

Time Difference
-------------------
0 hours 20 minutes
24 hours 0 minutes
2 hours 40 minutes


dbfiddle demo






share|improve this answer


























  • From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

    – Sami
    Nov 21 '18 at 22:24











  • @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

    – Barbaros Özhan
    Nov 21 '18 at 22:27






  • 1





    Yeah, it happen, but still we have the edit button there ;)

    – Sami
    Nov 21 '18 at 23:20





















0














You can get your desired results as



WITH Dates AS
(
SELECT 1 RN,

@sd StartD,
CAST(DATEADD(Day, -1, @ed) AS DATE) EndD
UNION
SELECT 2,
CAST(DATEADD(Day, 1, @sd) AS DATE),
CAST(@ed AS DATE)
UNION
SELECT 3,
CAST(@ed AS DATE),
@ed
)
SELECT
CAST( DATEDIFF(YEAR, StartD, EndD) AS VARCHAR(10) )+ ' Years, '+
CAST( DATEDIFF(MONTH, StartD, EndD)%12 AS VARCHAR(10) )+ ' Months, '+
CAST( (DATEDIFF(DAY, StartD, EndD)%31)%12
- CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) )+ ' Days, '+
CAST( (DATEDIFF(HOUR, StartD, EndD)%60)%24
- CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) ) + ' Hours,'+
CAST( DATEDIFF(MINUTE, StartD, EndD)%60 AS VARCHAR(10) ) +' Minutes, '+
CAST( DATEDIFF(SECOND, StartD, EndD)%60 AS VARCHAR(10) ) +' Seconds' AS Results
FROM Dates;


Results:



+----------------------------------------------------------+
| Results |
+----------------------------------------------------------+
| 0 Years, 0 Months, 0 Days, 0 Hours,20 Minutes, 0 Seconds |
| 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
| 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
+----------------------------------------------------------+


Demo



Finally, as a note I think your results should be



+----------------------------------------------------------+
| Results |
+----------------------------------------------------------+
| 0 Years, 0 Months, 1 Days, 1 Hours,20 Minutes, 0 Seconds |
| 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
| 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
+----------------------------------------------------------+


if I'm right, then all what you need to do is removing the two (2) CASE expressions.






share|improve this answer































    0














    I believe you will want the ability to apply this to a variety of task durations. Here I have used a dynamic "tally table" which just a series of numbers from 0 to (in this case) 100, if you need a greater range amend the Tally cte by adding extra cross joins. If you already have a table of numbers, or your own preferred method for this substitute that for mine.



    CREATE TABLE mytable(
    ID Integer NOT NULL
    ,Start_Date datetime NOT NULL
    ,End_Date datetime NOT NULL
    );
    INSERT INTO mytable(id,Start_Date,End_Date) VALUES (1,'2018-11-21 23:40:00','2018-11-23 02:40:00');
    INSERT INTO mytable(id,Start_Date,End_Date) VALUES (2,'2018-11-23 13:40:00','2018-11-23 22:40:00');
    INSERT INTO mytable(id,Start_Date,End_Date) VALUES (3,'2018-11-18 23:40:00','2018-11-23 02:40:00');


    3 test cases, as given, + a very short duration + a longer duration:



    ;WITH
    Digits AS (
    SELECT 0 AS digit UNION ALL
    SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
    SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
    SELECT 9
    )
    , Tally AS (
    SELECT [ones].digit
    + [tens].digit * 10
    -- + [hundreds].digit * 100
    AS number
    FROM Digits [ones]
    CROSS JOIN Digits [tens]
    -- CROSS JOIN Digits [hundreds]
    )
    select
    ID
    , cast(ca2.minutes/60 as varchar) + ' hours '
    + cast(ca2.minutes % 60 as varchar) + ' minutes' as Duration
    , format(on_date,'yyyy-MM-dd') on_date
    , portion
    , format(start_date,'yyyy-MM-dd hh:mm') start_date
    , format(end_date,'yyyy-MM-dd hh:mm') end_date
    from mytable t
    inner join Tally on Tally.number <= datediff(dd,t.Start_Date,t.End_Date)
    cross apply (
    select dateadd(dd,tally.number,dateadd(dd,datediff(dd,0,t.start_date),0)) on_date
    ) ca
    cross apply (
    select
    case
    when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then datediff(minute,t.start_date,t.end_date)
    when cast(t.end_date as date) = ca.on_date then datediff(minute,ca.on_date,t.end_date)
    when ca.on_date between t.start_date and t.end_date then 24*60
    when ca.on_date < t.start_date then datediff(minute,t.start_date,dateadd(dd,1,ca.on_date))
    end minutes
    , case
    when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then 'is on'
    when cast(t.end_date as date) = ca.on_date then 'end'
    when ca.on_date between t.start_date and t.end_date then 'span'
    when ca.on_date < t.start_date then 'start'
    end portion
    ) ca2


    I have used 2 apply operators, the first turns a number from the Tally into a date, and this is then re-used by the alias on_date in the second apply where we can calculate the duration. Note the second case expression portion is not essential, it's just there to help document the logic.



    Result:



           ID        Duration         on_date     portion      start_date          end_date      
    ---- ---- -------------------- ------------ --------- ------------------ ------------------
    1 1 0 hours 20 minutes 2018-11-21 start 2018-11-21 11:40 2018-11-23 02:40
    2 1 24 hours 0 minutes 2018-11-22 span 2018-11-21 11:40 2018-11-23 02:40
    3 1 2 hours 40 minutes 2018-11-23 end 2018-11-21 11:40 2018-11-23 02:40
    4 2 9 hours 0 minutes 2018-11-23 is on 2018-11-23 01:40 2018-11-23 10:40
    5 3 0 hours 20 minutes 2018-11-18 start 2018-11-18 11:40 2018-11-23 02:40
    6 3 24 hours 0 minutes 2018-11-19 span 2018-11-18 11:40 2018-11-23 02:40
    7 3 24 hours 0 minutes 2018-11-20 span 2018-11-18 11:40 2018-11-23 02:40
    8 3 24 hours 0 minutes 2018-11-21 span 2018-11-18 11:40 2018-11-23 02:40
    9 3 24 hours 0 minutes 2018-11-22 span 2018-11-18 11:40 2018-11-23 02:40
    10 3 2 hours 40 minutes 2018-11-23 end 2018-11-18 11:40 2018-11-23 02:40


    also see: https://rextester.com/VPTI85082






    share|improve this answer

























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      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      1














      Yes, CTE can be used with contribution of DATEDIFF and DATEADD functions together as :



      CREATE VIEW DAYS AS
      WITH CTE AS (
      SELECT 1 as nr
      UNION ALL
      SELECT nr+1
      FROM CTE
      WHERE nr <= DATEDIFF( day, CONVERT(date, '2018-11-21 23:40:00'),
      CONVERT(date, '2018-11-23 02:40:00') )
      )
      SELECT
      DATEDIFF(
      minute,
      (case when nr > 1 then
      DATEADD ( day , nr - 1 , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 1 , CONVERT(datetime, '2018-11-21 23:40:00'))
      end),

      (case when nr < 3 then
      DATEADD ( day , nr , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 3, CONVERT(datetime, '2018-11-23 02:40:00'))
      end)
      ) as time_diff
      FROM CTE;

      SELECT cast(time_diff/60 as varchar) + ' hours '
      + cast(time_diff % 60 as varchar) + ' minutes' as "Time Difference" FROM DAYS;

      Time Difference
      -------------------
      0 hours 20 minutes
      24 hours 0 minutes
      2 hours 40 minutes


      dbfiddle demo






      share|improve this answer


























      • From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

        – Sami
        Nov 21 '18 at 22:24











      • @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

        – Barbaros Özhan
        Nov 21 '18 at 22:27






      • 1





        Yeah, it happen, but still we have the edit button there ;)

        – Sami
        Nov 21 '18 at 23:20


















      1














      Yes, CTE can be used with contribution of DATEDIFF and DATEADD functions together as :



      CREATE VIEW DAYS AS
      WITH CTE AS (
      SELECT 1 as nr
      UNION ALL
      SELECT nr+1
      FROM CTE
      WHERE nr <= DATEDIFF( day, CONVERT(date, '2018-11-21 23:40:00'),
      CONVERT(date, '2018-11-23 02:40:00') )
      )
      SELECT
      DATEDIFF(
      minute,
      (case when nr > 1 then
      DATEADD ( day , nr - 1 , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 1 , CONVERT(datetime, '2018-11-21 23:40:00'))
      end),

      (case when nr < 3 then
      DATEADD ( day , nr , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 3, CONVERT(datetime, '2018-11-23 02:40:00'))
      end)
      ) as time_diff
      FROM CTE;

      SELECT cast(time_diff/60 as varchar) + ' hours '
      + cast(time_diff % 60 as varchar) + ' minutes' as "Time Difference" FROM DAYS;

      Time Difference
      -------------------
      0 hours 20 minutes
      24 hours 0 minutes
      2 hours 40 minutes


      dbfiddle demo






      share|improve this answer


























      • From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

        – Sami
        Nov 21 '18 at 22:24











      • @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

        – Barbaros Özhan
        Nov 21 '18 at 22:27






      • 1





        Yeah, it happen, but still we have the edit button there ;)

        – Sami
        Nov 21 '18 at 23:20
















      1












      1








      1







      Yes, CTE can be used with contribution of DATEDIFF and DATEADD functions together as :



      CREATE VIEW DAYS AS
      WITH CTE AS (
      SELECT 1 as nr
      UNION ALL
      SELECT nr+1
      FROM CTE
      WHERE nr <= DATEDIFF( day, CONVERT(date, '2018-11-21 23:40:00'),
      CONVERT(date, '2018-11-23 02:40:00') )
      )
      SELECT
      DATEDIFF(
      minute,
      (case when nr > 1 then
      DATEADD ( day , nr - 1 , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 1 , CONVERT(datetime, '2018-11-21 23:40:00'))
      end),

      (case when nr < 3 then
      DATEADD ( day , nr , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 3, CONVERT(datetime, '2018-11-23 02:40:00'))
      end)
      ) as time_diff
      FROM CTE;

      SELECT cast(time_diff/60 as varchar) + ' hours '
      + cast(time_diff % 60 as varchar) + ' minutes' as "Time Difference" FROM DAYS;

      Time Difference
      -------------------
      0 hours 20 minutes
      24 hours 0 minutes
      2 hours 40 minutes


      dbfiddle demo






      share|improve this answer















      Yes, CTE can be used with contribution of DATEDIFF and DATEADD functions together as :



      CREATE VIEW DAYS AS
      WITH CTE AS (
      SELECT 1 as nr
      UNION ALL
      SELECT nr+1
      FROM CTE
      WHERE nr <= DATEDIFF( day, CONVERT(date, '2018-11-21 23:40:00'),
      CONVERT(date, '2018-11-23 02:40:00') )
      )
      SELECT
      DATEDIFF(
      minute,
      (case when nr > 1 then
      DATEADD ( day , nr - 1 , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 1 , CONVERT(datetime, '2018-11-21 23:40:00'))
      end),

      (case when nr < 3 then
      DATEADD ( day , nr , CONVERT(date, '2018-11-21 23:40:00') )
      else
      DATEADD ( day , nr - 3, CONVERT(datetime, '2018-11-23 02:40:00'))
      end)
      ) as time_diff
      FROM CTE;

      SELECT cast(time_diff/60 as varchar) + ' hours '
      + cast(time_diff % 60 as varchar) + ' minutes' as "Time Difference" FROM DAYS;

      Time Difference
      -------------------
      0 hours 20 minutes
      24 hours 0 minutes
      2 hours 40 minutes


      dbfiddle demo







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited Nov 21 '18 at 22:33

























      answered Nov 21 '18 at 22:19









      Barbaros ÖzhanBarbaros Özhan

      13.5k71633




      13.5k71633













      • From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

        – Sami
        Nov 21 '18 at 22:24











      • @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

        – Barbaros Özhan
        Nov 21 '18 at 22:27






      • 1





        Yeah, it happen, but still we have the edit button there ;)

        – Sami
        Nov 21 '18 at 23:20





















      • From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

        – Sami
        Nov 21 '18 at 22:24











      • @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

        – Barbaros Özhan
        Nov 21 '18 at 22:27






      • 1





        Yeah, it happen, but still we have the edit button there ;)

        – Sami
        Nov 21 '18 at 23:20



















      From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

      – Sami
      Nov 21 '18 at 22:24





      From OP question last row should return "2 hour 40 min -- time between 2018-11-23 00:00:00 and 2018-11-23 02:40:00"

      – Sami
      Nov 21 '18 at 22:24













      @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

      – Barbaros Özhan
      Nov 21 '18 at 22:27





      @Sami ohh, didn't pay attention while going to bed :), let me try little more, thanks.

      – Barbaros Özhan
      Nov 21 '18 at 22:27




      1




      1





      Yeah, it happen, but still we have the edit button there ;)

      – Sami
      Nov 21 '18 at 23:20







      Yeah, it happen, but still we have the edit button there ;)

      – Sami
      Nov 21 '18 at 23:20















      0














      You can get your desired results as



      WITH Dates AS
      (
      SELECT 1 RN,

      @sd StartD,
      CAST(DATEADD(Day, -1, @ed) AS DATE) EndD
      UNION
      SELECT 2,
      CAST(DATEADD(Day, 1, @sd) AS DATE),
      CAST(@ed AS DATE)
      UNION
      SELECT 3,
      CAST(@ed AS DATE),
      @ed
      )
      SELECT
      CAST( DATEDIFF(YEAR, StartD, EndD) AS VARCHAR(10) )+ ' Years, '+
      CAST( DATEDIFF(MONTH, StartD, EndD)%12 AS VARCHAR(10) )+ ' Months, '+
      CAST( (DATEDIFF(DAY, StartD, EndD)%31)%12
      - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) )+ ' Days, '+
      CAST( (DATEDIFF(HOUR, StartD, EndD)%60)%24
      - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) ) + ' Hours,'+
      CAST( DATEDIFF(MINUTE, StartD, EndD)%60 AS VARCHAR(10) ) +' Minutes, '+
      CAST( DATEDIFF(SECOND, StartD, EndD)%60 AS VARCHAR(10) ) +' Seconds' AS Results
      FROM Dates;


      Results:



      +----------------------------------------------------------+
      | Results |
      +----------------------------------------------------------+
      | 0 Years, 0 Months, 0 Days, 0 Hours,20 Minutes, 0 Seconds |
      | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
      | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
      +----------------------------------------------------------+


      Demo



      Finally, as a note I think your results should be



      +----------------------------------------------------------+
      | Results |
      +----------------------------------------------------------+
      | 0 Years, 0 Months, 1 Days, 1 Hours,20 Minutes, 0 Seconds |
      | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
      | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
      +----------------------------------------------------------+


      if I'm right, then all what you need to do is removing the two (2) CASE expressions.






      share|improve this answer




























        0














        You can get your desired results as



        WITH Dates AS
        (
        SELECT 1 RN,

        @sd StartD,
        CAST(DATEADD(Day, -1, @ed) AS DATE) EndD
        UNION
        SELECT 2,
        CAST(DATEADD(Day, 1, @sd) AS DATE),
        CAST(@ed AS DATE)
        UNION
        SELECT 3,
        CAST(@ed AS DATE),
        @ed
        )
        SELECT
        CAST( DATEDIFF(YEAR, StartD, EndD) AS VARCHAR(10) )+ ' Years, '+
        CAST( DATEDIFF(MONTH, StartD, EndD)%12 AS VARCHAR(10) )+ ' Months, '+
        CAST( (DATEDIFF(DAY, StartD, EndD)%31)%12
        - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) )+ ' Days, '+
        CAST( (DATEDIFF(HOUR, StartD, EndD)%60)%24
        - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) ) + ' Hours,'+
        CAST( DATEDIFF(MINUTE, StartD, EndD)%60 AS VARCHAR(10) ) +' Minutes, '+
        CAST( DATEDIFF(SECOND, StartD, EndD)%60 AS VARCHAR(10) ) +' Seconds' AS Results
        FROM Dates;


        Results:



        +----------------------------------------------------------+
        | Results |
        +----------------------------------------------------------+
        | 0 Years, 0 Months, 0 Days, 0 Hours,20 Minutes, 0 Seconds |
        | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
        | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
        +----------------------------------------------------------+


        Demo



        Finally, as a note I think your results should be



        +----------------------------------------------------------+
        | Results |
        +----------------------------------------------------------+
        | 0 Years, 0 Months, 1 Days, 1 Hours,20 Minutes, 0 Seconds |
        | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
        | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
        +----------------------------------------------------------+


        if I'm right, then all what you need to do is removing the two (2) CASE expressions.






        share|improve this answer


























          0












          0








          0







          You can get your desired results as



          WITH Dates AS
          (
          SELECT 1 RN,

          @sd StartD,
          CAST(DATEADD(Day, -1, @ed) AS DATE) EndD
          UNION
          SELECT 2,
          CAST(DATEADD(Day, 1, @sd) AS DATE),
          CAST(@ed AS DATE)
          UNION
          SELECT 3,
          CAST(@ed AS DATE),
          @ed
          )
          SELECT
          CAST( DATEDIFF(YEAR, StartD, EndD) AS VARCHAR(10) )+ ' Years, '+
          CAST( DATEDIFF(MONTH, StartD, EndD)%12 AS VARCHAR(10) )+ ' Months, '+
          CAST( (DATEDIFF(DAY, StartD, EndD)%31)%12
          - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) )+ ' Days, '+
          CAST( (DATEDIFF(HOUR, StartD, EndD)%60)%24
          - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) ) + ' Hours,'+
          CAST( DATEDIFF(MINUTE, StartD, EndD)%60 AS VARCHAR(10) ) +' Minutes, '+
          CAST( DATEDIFF(SECOND, StartD, EndD)%60 AS VARCHAR(10) ) +' Seconds' AS Results
          FROM Dates;


          Results:



          +----------------------------------------------------------+
          | Results |
          +----------------------------------------------------------+
          | 0 Years, 0 Months, 0 Days, 0 Hours,20 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
          +----------------------------------------------------------+


          Demo



          Finally, as a note I think your results should be



          +----------------------------------------------------------+
          | Results |
          +----------------------------------------------------------+
          | 0 Years, 0 Months, 1 Days, 1 Hours,20 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
          +----------------------------------------------------------+


          if I'm right, then all what you need to do is removing the two (2) CASE expressions.






          share|improve this answer













          You can get your desired results as



          WITH Dates AS
          (
          SELECT 1 RN,

          @sd StartD,
          CAST(DATEADD(Day, -1, @ed) AS DATE) EndD
          UNION
          SELECT 2,
          CAST(DATEADD(Day, 1, @sd) AS DATE),
          CAST(@ed AS DATE)
          UNION
          SELECT 3,
          CAST(@ed AS DATE),
          @ed
          )
          SELECT
          CAST( DATEDIFF(YEAR, StartD, EndD) AS VARCHAR(10) )+ ' Years, '+
          CAST( DATEDIFF(MONTH, StartD, EndD)%12 AS VARCHAR(10) )+ ' Months, '+
          CAST( (DATEDIFF(DAY, StartD, EndD)%31)%12
          - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) )+ ' Days, '+
          CAST( (DATEDIFF(HOUR, StartD, EndD)%60)%24
          - CASE WHEN RN = 1 THEN RN ELSE 0 END AS VARCHAR(10) ) + ' Hours,'+
          CAST( DATEDIFF(MINUTE, StartD, EndD)%60 AS VARCHAR(10) ) +' Minutes, '+
          CAST( DATEDIFF(SECOND, StartD, EndD)%60 AS VARCHAR(10) ) +' Seconds' AS Results
          FROM Dates;


          Results:



          +----------------------------------------------------------+
          | Results |
          +----------------------------------------------------------+
          | 0 Years, 0 Months, 0 Days, 0 Hours,20 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
          +----------------------------------------------------------+


          Demo



          Finally, as a note I think your results should be



          +----------------------------------------------------------+
          | Results |
          +----------------------------------------------------------+
          | 0 Years, 0 Months, 1 Days, 1 Hours,20 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 1 Days, 0 Hours,0 Minutes, 0 Seconds |
          | 0 Years, 0 Months, 0 Days, 2 Hours,40 Minutes, 0 Seconds |
          +----------------------------------------------------------+


          if I'm right, then all what you need to do is removing the two (2) CASE expressions.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 21 '18 at 23:07









          SamiSami

          8,94331241




          8,94331241























              0














              I believe you will want the ability to apply this to a variety of task durations. Here I have used a dynamic "tally table" which just a series of numbers from 0 to (in this case) 100, if you need a greater range amend the Tally cte by adding extra cross joins. If you already have a table of numbers, or your own preferred method for this substitute that for mine.



              CREATE TABLE mytable(
              ID Integer NOT NULL
              ,Start_Date datetime NOT NULL
              ,End_Date datetime NOT NULL
              );
              INSERT INTO mytable(id,Start_Date,End_Date) VALUES (1,'2018-11-21 23:40:00','2018-11-23 02:40:00');
              INSERT INTO mytable(id,Start_Date,End_Date) VALUES (2,'2018-11-23 13:40:00','2018-11-23 22:40:00');
              INSERT INTO mytable(id,Start_Date,End_Date) VALUES (3,'2018-11-18 23:40:00','2018-11-23 02:40:00');


              3 test cases, as given, + a very short duration + a longer duration:



              ;WITH
              Digits AS (
              SELECT 0 AS digit UNION ALL
              SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
              SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
              SELECT 9
              )
              , Tally AS (
              SELECT [ones].digit
              + [tens].digit * 10
              -- + [hundreds].digit * 100
              AS number
              FROM Digits [ones]
              CROSS JOIN Digits [tens]
              -- CROSS JOIN Digits [hundreds]
              )
              select
              ID
              , cast(ca2.minutes/60 as varchar) + ' hours '
              + cast(ca2.minutes % 60 as varchar) + ' minutes' as Duration
              , format(on_date,'yyyy-MM-dd') on_date
              , portion
              , format(start_date,'yyyy-MM-dd hh:mm') start_date
              , format(end_date,'yyyy-MM-dd hh:mm') end_date
              from mytable t
              inner join Tally on Tally.number <= datediff(dd,t.Start_Date,t.End_Date)
              cross apply (
              select dateadd(dd,tally.number,dateadd(dd,datediff(dd,0,t.start_date),0)) on_date
              ) ca
              cross apply (
              select
              case
              when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then datediff(minute,t.start_date,t.end_date)
              when cast(t.end_date as date) = ca.on_date then datediff(minute,ca.on_date,t.end_date)
              when ca.on_date between t.start_date and t.end_date then 24*60
              when ca.on_date < t.start_date then datediff(minute,t.start_date,dateadd(dd,1,ca.on_date))
              end minutes
              , case
              when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then 'is on'
              when cast(t.end_date as date) = ca.on_date then 'end'
              when ca.on_date between t.start_date and t.end_date then 'span'
              when ca.on_date < t.start_date then 'start'
              end portion
              ) ca2


              I have used 2 apply operators, the first turns a number from the Tally into a date, and this is then re-used by the alias on_date in the second apply where we can calculate the duration. Note the second case expression portion is not essential, it's just there to help document the logic.



              Result:



                     ID        Duration         on_date     portion      start_date          end_date      
              ---- ---- -------------------- ------------ --------- ------------------ ------------------
              1 1 0 hours 20 minutes 2018-11-21 start 2018-11-21 11:40 2018-11-23 02:40
              2 1 24 hours 0 minutes 2018-11-22 span 2018-11-21 11:40 2018-11-23 02:40
              3 1 2 hours 40 minutes 2018-11-23 end 2018-11-21 11:40 2018-11-23 02:40
              4 2 9 hours 0 minutes 2018-11-23 is on 2018-11-23 01:40 2018-11-23 10:40
              5 3 0 hours 20 minutes 2018-11-18 start 2018-11-18 11:40 2018-11-23 02:40
              6 3 24 hours 0 minutes 2018-11-19 span 2018-11-18 11:40 2018-11-23 02:40
              7 3 24 hours 0 minutes 2018-11-20 span 2018-11-18 11:40 2018-11-23 02:40
              8 3 24 hours 0 minutes 2018-11-21 span 2018-11-18 11:40 2018-11-23 02:40
              9 3 24 hours 0 minutes 2018-11-22 span 2018-11-18 11:40 2018-11-23 02:40
              10 3 2 hours 40 minutes 2018-11-23 end 2018-11-18 11:40 2018-11-23 02:40


              also see: https://rextester.com/VPTI85082






              share|improve this answer






























                0














                I believe you will want the ability to apply this to a variety of task durations. Here I have used a dynamic "tally table" which just a series of numbers from 0 to (in this case) 100, if you need a greater range amend the Tally cte by adding extra cross joins. If you already have a table of numbers, or your own preferred method for this substitute that for mine.



                CREATE TABLE mytable(
                ID Integer NOT NULL
                ,Start_Date datetime NOT NULL
                ,End_Date datetime NOT NULL
                );
                INSERT INTO mytable(id,Start_Date,End_Date) VALUES (1,'2018-11-21 23:40:00','2018-11-23 02:40:00');
                INSERT INTO mytable(id,Start_Date,End_Date) VALUES (2,'2018-11-23 13:40:00','2018-11-23 22:40:00');
                INSERT INTO mytable(id,Start_Date,End_Date) VALUES (3,'2018-11-18 23:40:00','2018-11-23 02:40:00');


                3 test cases, as given, + a very short duration + a longer duration:



                ;WITH
                Digits AS (
                SELECT 0 AS digit UNION ALL
                SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
                SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
                SELECT 9
                )
                , Tally AS (
                SELECT [ones].digit
                + [tens].digit * 10
                -- + [hundreds].digit * 100
                AS number
                FROM Digits [ones]
                CROSS JOIN Digits [tens]
                -- CROSS JOIN Digits [hundreds]
                )
                select
                ID
                , cast(ca2.minutes/60 as varchar) + ' hours '
                + cast(ca2.minutes % 60 as varchar) + ' minutes' as Duration
                , format(on_date,'yyyy-MM-dd') on_date
                , portion
                , format(start_date,'yyyy-MM-dd hh:mm') start_date
                , format(end_date,'yyyy-MM-dd hh:mm') end_date
                from mytable t
                inner join Tally on Tally.number <= datediff(dd,t.Start_Date,t.End_Date)
                cross apply (
                select dateadd(dd,tally.number,dateadd(dd,datediff(dd,0,t.start_date),0)) on_date
                ) ca
                cross apply (
                select
                case
                when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then datediff(minute,t.start_date,t.end_date)
                when cast(t.end_date as date) = ca.on_date then datediff(minute,ca.on_date,t.end_date)
                when ca.on_date between t.start_date and t.end_date then 24*60
                when ca.on_date < t.start_date then datediff(minute,t.start_date,dateadd(dd,1,ca.on_date))
                end minutes
                , case
                when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then 'is on'
                when cast(t.end_date as date) = ca.on_date then 'end'
                when ca.on_date between t.start_date and t.end_date then 'span'
                when ca.on_date < t.start_date then 'start'
                end portion
                ) ca2


                I have used 2 apply operators, the first turns a number from the Tally into a date, and this is then re-used by the alias on_date in the second apply where we can calculate the duration. Note the second case expression portion is not essential, it's just there to help document the logic.



                Result:



                       ID        Duration         on_date     portion      start_date          end_date      
                ---- ---- -------------------- ------------ --------- ------------------ ------------------
                1 1 0 hours 20 minutes 2018-11-21 start 2018-11-21 11:40 2018-11-23 02:40
                2 1 24 hours 0 minutes 2018-11-22 span 2018-11-21 11:40 2018-11-23 02:40
                3 1 2 hours 40 minutes 2018-11-23 end 2018-11-21 11:40 2018-11-23 02:40
                4 2 9 hours 0 minutes 2018-11-23 is on 2018-11-23 01:40 2018-11-23 10:40
                5 3 0 hours 20 minutes 2018-11-18 start 2018-11-18 11:40 2018-11-23 02:40
                6 3 24 hours 0 minutes 2018-11-19 span 2018-11-18 11:40 2018-11-23 02:40
                7 3 24 hours 0 minutes 2018-11-20 span 2018-11-18 11:40 2018-11-23 02:40
                8 3 24 hours 0 minutes 2018-11-21 span 2018-11-18 11:40 2018-11-23 02:40
                9 3 24 hours 0 minutes 2018-11-22 span 2018-11-18 11:40 2018-11-23 02:40
                10 3 2 hours 40 minutes 2018-11-23 end 2018-11-18 11:40 2018-11-23 02:40


                also see: https://rextester.com/VPTI85082






                share|improve this answer




























                  0












                  0








                  0







                  I believe you will want the ability to apply this to a variety of task durations. Here I have used a dynamic "tally table" which just a series of numbers from 0 to (in this case) 100, if you need a greater range amend the Tally cte by adding extra cross joins. If you already have a table of numbers, or your own preferred method for this substitute that for mine.



                  CREATE TABLE mytable(
                  ID Integer NOT NULL
                  ,Start_Date datetime NOT NULL
                  ,End_Date datetime NOT NULL
                  );
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (1,'2018-11-21 23:40:00','2018-11-23 02:40:00');
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (2,'2018-11-23 13:40:00','2018-11-23 22:40:00');
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (3,'2018-11-18 23:40:00','2018-11-23 02:40:00');


                  3 test cases, as given, + a very short duration + a longer duration:



                  ;WITH
                  Digits AS (
                  SELECT 0 AS digit UNION ALL
                  SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
                  SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
                  SELECT 9
                  )
                  , Tally AS (
                  SELECT [ones].digit
                  + [tens].digit * 10
                  -- + [hundreds].digit * 100
                  AS number
                  FROM Digits [ones]
                  CROSS JOIN Digits [tens]
                  -- CROSS JOIN Digits [hundreds]
                  )
                  select
                  ID
                  , cast(ca2.minutes/60 as varchar) + ' hours '
                  + cast(ca2.minutes % 60 as varchar) + ' minutes' as Duration
                  , format(on_date,'yyyy-MM-dd') on_date
                  , portion
                  , format(start_date,'yyyy-MM-dd hh:mm') start_date
                  , format(end_date,'yyyy-MM-dd hh:mm') end_date
                  from mytable t
                  inner join Tally on Tally.number <= datediff(dd,t.Start_Date,t.End_Date)
                  cross apply (
                  select dateadd(dd,tally.number,dateadd(dd,datediff(dd,0,t.start_date),0)) on_date
                  ) ca
                  cross apply (
                  select
                  case
                  when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then datediff(minute,t.start_date,t.end_date)
                  when cast(t.end_date as date) = ca.on_date then datediff(minute,ca.on_date,t.end_date)
                  when ca.on_date between t.start_date and t.end_date then 24*60
                  when ca.on_date < t.start_date then datediff(minute,t.start_date,dateadd(dd,1,ca.on_date))
                  end minutes
                  , case
                  when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then 'is on'
                  when cast(t.end_date as date) = ca.on_date then 'end'
                  when ca.on_date between t.start_date and t.end_date then 'span'
                  when ca.on_date < t.start_date then 'start'
                  end portion
                  ) ca2


                  I have used 2 apply operators, the first turns a number from the Tally into a date, and this is then re-used by the alias on_date in the second apply where we can calculate the duration. Note the second case expression portion is not essential, it's just there to help document the logic.



                  Result:



                         ID        Duration         on_date     portion      start_date          end_date      
                  ---- ---- -------------------- ------------ --------- ------------------ ------------------
                  1 1 0 hours 20 minutes 2018-11-21 start 2018-11-21 11:40 2018-11-23 02:40
                  2 1 24 hours 0 minutes 2018-11-22 span 2018-11-21 11:40 2018-11-23 02:40
                  3 1 2 hours 40 minutes 2018-11-23 end 2018-11-21 11:40 2018-11-23 02:40
                  4 2 9 hours 0 minutes 2018-11-23 is on 2018-11-23 01:40 2018-11-23 10:40
                  5 3 0 hours 20 minutes 2018-11-18 start 2018-11-18 11:40 2018-11-23 02:40
                  6 3 24 hours 0 minutes 2018-11-19 span 2018-11-18 11:40 2018-11-23 02:40
                  7 3 24 hours 0 minutes 2018-11-20 span 2018-11-18 11:40 2018-11-23 02:40
                  8 3 24 hours 0 minutes 2018-11-21 span 2018-11-18 11:40 2018-11-23 02:40
                  9 3 24 hours 0 minutes 2018-11-22 span 2018-11-18 11:40 2018-11-23 02:40
                  10 3 2 hours 40 minutes 2018-11-23 end 2018-11-18 11:40 2018-11-23 02:40


                  also see: https://rextester.com/VPTI85082






                  share|improve this answer















                  I believe you will want the ability to apply this to a variety of task durations. Here I have used a dynamic "tally table" which just a series of numbers from 0 to (in this case) 100, if you need a greater range amend the Tally cte by adding extra cross joins. If you already have a table of numbers, or your own preferred method for this substitute that for mine.



                  CREATE TABLE mytable(
                  ID Integer NOT NULL
                  ,Start_Date datetime NOT NULL
                  ,End_Date datetime NOT NULL
                  );
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (1,'2018-11-21 23:40:00','2018-11-23 02:40:00');
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (2,'2018-11-23 13:40:00','2018-11-23 22:40:00');
                  INSERT INTO mytable(id,Start_Date,End_Date) VALUES (3,'2018-11-18 23:40:00','2018-11-23 02:40:00');


                  3 test cases, as given, + a very short duration + a longer duration:



                  ;WITH
                  Digits AS (
                  SELECT 0 AS digit UNION ALL
                  SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
                  SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
                  SELECT 9
                  )
                  , Tally AS (
                  SELECT [ones].digit
                  + [tens].digit * 10
                  -- + [hundreds].digit * 100
                  AS number
                  FROM Digits [ones]
                  CROSS JOIN Digits [tens]
                  -- CROSS JOIN Digits [hundreds]
                  )
                  select
                  ID
                  , cast(ca2.minutes/60 as varchar) + ' hours '
                  + cast(ca2.minutes % 60 as varchar) + ' minutes' as Duration
                  , format(on_date,'yyyy-MM-dd') on_date
                  , portion
                  , format(start_date,'yyyy-MM-dd hh:mm') start_date
                  , format(end_date,'yyyy-MM-dd hh:mm') end_date
                  from mytable t
                  inner join Tally on Tally.number <= datediff(dd,t.Start_Date,t.End_Date)
                  cross apply (
                  select dateadd(dd,tally.number,dateadd(dd,datediff(dd,0,t.start_date),0)) on_date
                  ) ca
                  cross apply (
                  select
                  case
                  when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then datediff(minute,t.start_date,t.end_date)
                  when cast(t.end_date as date) = ca.on_date then datediff(minute,ca.on_date,t.end_date)
                  when ca.on_date between t.start_date and t.end_date then 24*60
                  when ca.on_date < t.start_date then datediff(minute,t.start_date,dateadd(dd,1,ca.on_date))
                  end minutes
                  , case
                  when t.start_date >= ca.on_date and t.end_date <= dateadd(dd,1,ca.on_date) then 'is on'
                  when cast(t.end_date as date) = ca.on_date then 'end'
                  when ca.on_date between t.start_date and t.end_date then 'span'
                  when ca.on_date < t.start_date then 'start'
                  end portion
                  ) ca2


                  I have used 2 apply operators, the first turns a number from the Tally into a date, and this is then re-used by the alias on_date in the second apply where we can calculate the duration. Note the second case expression portion is not essential, it's just there to help document the logic.



                  Result:



                         ID        Duration         on_date     portion      start_date          end_date      
                  ---- ---- -------------------- ------------ --------- ------------------ ------------------
                  1 1 0 hours 20 minutes 2018-11-21 start 2018-11-21 11:40 2018-11-23 02:40
                  2 1 24 hours 0 minutes 2018-11-22 span 2018-11-21 11:40 2018-11-23 02:40
                  3 1 2 hours 40 minutes 2018-11-23 end 2018-11-21 11:40 2018-11-23 02:40
                  4 2 9 hours 0 minutes 2018-11-23 is on 2018-11-23 01:40 2018-11-23 10:40
                  5 3 0 hours 20 minutes 2018-11-18 start 2018-11-18 11:40 2018-11-23 02:40
                  6 3 24 hours 0 minutes 2018-11-19 span 2018-11-18 11:40 2018-11-23 02:40
                  7 3 24 hours 0 minutes 2018-11-20 span 2018-11-18 11:40 2018-11-23 02:40
                  8 3 24 hours 0 minutes 2018-11-21 span 2018-11-18 11:40 2018-11-23 02:40
                  9 3 24 hours 0 minutes 2018-11-22 span 2018-11-18 11:40 2018-11-23 02:40
                  10 3 2 hours 40 minutes 2018-11-23 end 2018-11-18 11:40 2018-11-23 02:40


                  also see: https://rextester.com/VPTI85082







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Nov 21 '18 at 23:49

























                  answered Nov 21 '18 at 23:29









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