Mixing
3 table joins in mongodb
0
Considering the below SQL query, when i need to achieve data values from 3 different tables. i am simulating requirement in SQL as
create table h(id int, hname varchar(20));
create table r(id int, rname varchar(20), hid int, facid int);
create table f(id int, fname varchar(20));
insert into h values(1, 'Hotel1');
insert into h values(2, 'Hotel2');
insert into r values(1, 'room1', 1, 1);
insert into r values(1, 'room1', 1, 2);
insert into r values(1, 'room1', 1, 3);
insert into r values(2, 'room2', 1, 1);
insert into r values(2, 'room2', 1, 2);
insert into f values(1, 'fac1');
insert into f values(2, 'fac2');
insert into f values(3, 'fac3');
select rname, facid, hname from r
inner join f
on f.id = r.facid
inner join h
on r.hid= h.id
I am getting as:
room1|1|Hotel1
room1|2|Hotel1
room1|3|Hotel1
room2|1|Hotel1
room2|2|Hotel1
Now, i require to have the same understanding built in MongoDB. i tried 2 collection join as
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67"), }
},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{ "$project" : {"facilities":1}}
])
How can i add another collection to this query to get values for each
facilities for a room in a hotel.
Facilites:
{
"_id" : ObjectId("5123123123123scsd2"),
"facility_price" : 2132,
"facility_serves" : 2,
"facility_name" : "Mini Bar",
"facility_type" : "Room Related",
"facility_desc" : "Minibar for in room fine dine."
}
Rooms:
{
"_id" : ObjectId("234234jhd98234jhfw23"),
"room_len" : 10,
"room_name" : "Single",
"hotel_id" : ObjectId("5c01323213123295a"),
"facilities" : [
ObjectId("5123123123123scsd2"),
ObjectId("58237h9a8723h4239a")
],
"room_desc" : "good room for family and friends",
"room_capacity" : 6,
"room_price" : 1234,
"total_rooms" : 13,
"room_brd" : 12,
"room_type" : "Executive Suite"
}
Hotel:
{
"_id" : ObjectId("5c01323213123295a"),
"estd" : "20160808",
"rating" : "4",
"long_desc" : "Hotel Name is situated in posh locality of ,
"chain" : "",
"locality" : "good locality",
"country" : "country code",
"hoteladdress" : "some hotel address",
"hoteltype" : "family",
"short_desc" : "This elegant 4-star boutique hotel is just a 5-minute walk ",
"longitude" : "74.82260099999996",
"plus_code" : "8J6P3R8F+V2",
"city_center_distance" : 6,
"hotelname" : "Hotel Name id",
"floors" : 3,
"postal_code" : 122321,
"rooms" : 23.,
"latitude" : "12.312",
"airport_distance" : 14,
"city" : "SCS",
"phno" : NumberLong(4234234234)
}
sql mongodb join
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
add a comment |
0
Considering the below SQL query, when i need to achieve data values from 3 different tables. i am simulating requirement in SQL as
create table h(id int, hname varchar(20));
create table r(id int, rname varchar(20), hid int, facid int);
create table f(id int, fname varchar(20));
insert into h values(1, 'Hotel1');
insert into h values(2, 'Hotel2');
insert into r values(1, 'room1', 1, 1);
insert into r values(1, 'room1', 1, 2);
insert into r values(1, 'room1', 1, 3);
insert into r values(2, 'room2', 1, 1);
insert into r values(2, 'room2', 1, 2);
insert into f values(1, 'fac1');
insert into f values(2, 'fac2');
insert into f values(3, 'fac3');
select rname, facid, hname from r
inner join f
on f.id = r.facid
inner join h
on r.hid= h.id
I am getting as:
room1|1|Hotel1
room1|2|Hotel1
room1|3|Hotel1
room2|1|Hotel1
room2|2|Hotel1
Now, i require to have the same understanding built in MongoDB. i tried 2 collection join as
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67"), }
},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{ "$project" : {"facilities":1}}
])
How can i add another collection to this query to get values for each
facilities for a room in a hotel.
Facilites:
{
"_id" : ObjectId("5123123123123scsd2"),
"facility_price" : 2132,
"facility_serves" : 2,
"facility_name" : "Mini Bar",
"facility_type" : "Room Related",
"facility_desc" : "Minibar for in room fine dine."
}
Rooms:
{
"_id" : ObjectId("234234jhd98234jhfw23"),
"room_len" : 10,
"room_name" : "Single",
"hotel_id" : ObjectId("5c01323213123295a"),
"facilities" : [
ObjectId("5123123123123scsd2"),
ObjectId("58237h9a8723h4239a")
],
"room_desc" : "good room for family and friends",
"room_capacity" : 6,
"room_price" : 1234,
"total_rooms" : 13,
"room_brd" : 12,
"room_type" : "Executive Suite"
}
Hotel:
{
"_id" : ObjectId("5c01323213123295a"),
"estd" : "20160808",
"rating" : "4",
"long_desc" : "Hotel Name is situated in posh locality of ,
"chain" : "",
"locality" : "good locality",
"country" : "country code",
"hoteladdress" : "some hotel address",
"hoteltype" : "family",
"short_desc" : "This elegant 4-star boutique hotel is just a 5-minute walk ",
"longitude" : "74.82260099999996",
"plus_code" : "8J6P3R8F+V2",
"city_center_distance" : 6,
"hotelname" : "Hotel Name id",
"floors" : 3,
"postal_code" : 122321,
"rooms" : 23.,
"latitude" : "12.312",
"airport_distance" : 14,
"city" : "SCS",
"phno" : NumberLong(4234234234)
}
sql mongodb join
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25
add a comment |
0
0
0
Considering the below SQL query, when i need to achieve data values from 3 different tables. i am simulating requirement in SQL as
create table h(id int, hname varchar(20));
create table r(id int, rname varchar(20), hid int, facid int);
create table f(id int, fname varchar(20));
insert into h values(1, 'Hotel1');
insert into h values(2, 'Hotel2');
insert into r values(1, 'room1', 1, 1);
insert into r values(1, 'room1', 1, 2);
insert into r values(1, 'room1', 1, 3);
insert into r values(2, 'room2', 1, 1);
insert into r values(2, 'room2', 1, 2);
insert into f values(1, 'fac1');
insert into f values(2, 'fac2');
insert into f values(3, 'fac3');
select rname, facid, hname from r
inner join f
on f.id = r.facid
inner join h
on r.hid= h.id
I am getting as:
room1|1|Hotel1
room1|2|Hotel1
room1|3|Hotel1
room2|1|Hotel1
room2|2|Hotel1
Now, i require to have the same understanding built in MongoDB. i tried 2 collection join as
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67"), }
},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{ "$project" : {"facilities":1}}
])
How can i add another collection to this query to get values for each
facilities for a room in a hotel.
Facilites:
{
"_id" : ObjectId("5123123123123scsd2"),
"facility_price" : 2132,
"facility_serves" : 2,
"facility_name" : "Mini Bar",
"facility_type" : "Room Related",
"facility_desc" : "Minibar for in room fine dine."
}
Rooms:
{
"_id" : ObjectId("234234jhd98234jhfw23"),
"room_len" : 10,
"room_name" : "Single",
"hotel_id" : ObjectId("5c01323213123295a"),
"facilities" : [
ObjectId("5123123123123scsd2"),
ObjectId("58237h9a8723h4239a")
],
"room_desc" : "good room for family and friends",
"room_capacity" : 6,
"room_price" : 1234,
"total_rooms" : 13,
"room_brd" : 12,
"room_type" : "Executive Suite"
}
Hotel:
{
"_id" : ObjectId("5c01323213123295a"),
"estd" : "20160808",
"rating" : "4",
"long_desc" : "Hotel Name is situated in posh locality of ,
"chain" : "",
"locality" : "good locality",
"country" : "country code",
"hoteladdress" : "some hotel address",
"hoteltype" : "family",
"short_desc" : "This elegant 4-star boutique hotel is just a 5-minute walk ",
"longitude" : "74.82260099999996",
"plus_code" : "8J6P3R8F+V2",
"city_center_distance" : 6,
"hotelname" : "Hotel Name id",
"floors" : 3,
"postal_code" : 122321,
"rooms" : 23.,
"latitude" : "12.312",
"airport_distance" : 14,
"city" : "SCS",
"phno" : NumberLong(4234234234)
}
sql mongodb join
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
Considering the below SQL query, when i need to achieve data values from 3 different tables. i am simulating requirement in SQL as
create table h(id int, hname varchar(20));
create table r(id int, rname varchar(20), hid int, facid int);
create table f(id int, fname varchar(20));
insert into h values(1, 'Hotel1');
insert into h values(2, 'Hotel2');
insert into r values(1, 'room1', 1, 1);
insert into r values(1, 'room1', 1, 2);
insert into r values(1, 'room1', 1, 3);
insert into r values(2, 'room2', 1, 1);
insert into r values(2, 'room2', 1, 2);
insert into f values(1, 'fac1');
insert into f values(2, 'fac2');
insert into f values(3, 'fac3');
select rname, facid, hname from r
inner join f
on f.id = r.facid
inner join h
on r.hid= h.id
I am getting as:
room1|1|Hotel1
room1|2|Hotel1
room1|3|Hotel1
room2|1|Hotel1
room2|2|Hotel1
Now, i require to have the same understanding built in MongoDB. i tried 2 collection join as
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67"), }
},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{ "$project" : {"facilities":1}}
])
How can i add another collection to this query to get values for each
facilities for a room in a hotel.
Facilites:
{
"_id" : ObjectId("5123123123123scsd2"),
"facility_price" : 2132,
"facility_serves" : 2,
"facility_name" : "Mini Bar",
"facility_type" : "Room Related",
"facility_desc" : "Minibar for in room fine dine."
}
Rooms:
{
"_id" : ObjectId("234234jhd98234jhfw23"),
"room_len" : 10,
"room_name" : "Single",
"hotel_id" : ObjectId("5c01323213123295a"),
"facilities" : [
ObjectId("5123123123123scsd2"),
ObjectId("58237h9a8723h4239a")
],
"room_desc" : "good room for family and friends",
"room_capacity" : 6,
"room_price" : 1234,
"total_rooms" : 13,
"room_brd" : 12,
"room_type" : "Executive Suite"
}
Hotel:
{
"_id" : ObjectId("5c01323213123295a"),
"estd" : "20160808",
"rating" : "4",
"long_desc" : "Hotel Name is situated in posh locality of ,
"chain" : "",
"locality" : "good locality",
"country" : "country code",
"hoteladdress" : "some hotel address",
"hoteltype" : "family",
"short_desc" : "This elegant 4-star boutique hotel is just a 5-minute walk ",
"longitude" : "74.82260099999996",
"plus_code" : "8J6P3R8F+V2",
"city_center_distance" : 6,
"hotelname" : "Hotel Name id",
"floors" : 3,
"postal_code" : 122321,
"rooms" : 23.,
"latitude" : "12.312",
"airport_distance" : 14,
"city" : "SCS",
"phno" : NumberLong(4234234234)
}
sql mongodb join
sql mongodb join
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
edited Jan 7 at 7:30
Saqib Mujtaba
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
asked Jan 2 at 16:47
Saqib MujtabaSaqib Mujtaba
356214
356214
Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25
add a comment |
Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25
Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25
add a comment |
1 Answer
1
active
oldest
votes
0
Try somthing like as below:
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67")}},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{
"$lookup":
{
"from": "h", // name of your collection
"localField": "hid",
"foreignField": "_id",
"as": "hotel"
}
},
{
"$project" : {"facilities":1, "hotel":1}
}
])
answered Jan 2 at 16:56
JitendraJitendra
1,086622
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
add a comment |
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0
Try somthing like as below:
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67")}},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{
"$lookup":
{
"from": "h", // name of your collection
"localField": "hid",
"foreignField": "_id",
"as": "hotel"
}
},
{
"$project" : {"facilities":1, "hotel":1}
}
])
answered Jan 2 at 16:56
JitendraJitendra
1,086622
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
add a comment |
0
Try somthing like as below:
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67")}},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{
"$lookup":
{
"from": "h", // name of your collection
"localField": "hid",
"foreignField": "_id",
"as": "hotel"
}
},
{
"$project" : {"facilities":1, "hotel":1}
}
])
answered Jan 2 at 16:56
JitendraJitendra
1,086622
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
add a comment |
0
0
0
Try somthing like as below:
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67")}},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{
"$lookup":
{
"from": "h", // name of your collection
"localField": "hid",
"foreignField": "_id",
"as": "hotel"
}
},
{
"$project" : {"facilities":1, "hotel":1}
}
])
answered Jan 2 at 16:56
JitendraJitendra
1,086622
Try somthing like as below:
rooms.aggregate([ { "$match" : { "_id" : ObjectId("5c11fb6fc7daa1c774fb4e67")}},
{
"$lookup":
{
"from": "facility",
"localField": "facilities",
"foreignField": "_id",
"as": "facilities"
}
},
{
"$lookup":
{
"from": "h", // name of your collection
"localField": "hid",
"foreignField": "_id",
"as": "hotel"
}
},
{
"$project" : {"facilities":1, "hotel":1}
}
])
answered Jan 2 at 16:56
JitendraJitendra
1,086622
answered Jan 2 at 16:56
JitendraJitendra
1,086622
answered Jan 2 at 16:56
JitendraJitendra
1,086622
answered Jan 2 at 16:56
JitendraJitendra
1,086622
1,086622
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
add a comment |
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
i should have all the fields of collection room and collection facilities
– Saqib Mujtaba
Jan 2 at 17:17
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
You can directly append field from room collection in your "$project". like { "$project": { "roomNumber":1,"roomKeyNumber":1 } } along with facilities and hotel.
– Jitendra
Jan 2 at 17:26
add a comment |
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Could you post the sample documents from all the collections
– Anthony Winzlet
Jan 3 at 6:17
added sample collection document structure @AnthonyWinzlet
– Saqib Mujtaba
Jan 7 at 7:31
I think the answer provided below is correct what is the issue?
– Anthony Winzlet
Jan 7 at 17:25