How could I select a column based on another column in mySQL?

The following script works fine. But I want to write it in one line rather than three lines. 'Size" is passed from my main program and its used here to test. Simply I want to get Price based on size.

Table columns :
LISTING_ID, PRICE_LARGE_PRICE, PRICE_SMALL_PRICE.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,PRICE_SMALL_PRICE

INTO

    @PRICE_LARGE_PRICE,@PRICE_SMALL_PRICE

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;



SET @ITEM_PRICE = (CASE @Size WHEN 'REGULAR' THEN @PRICE_LARGE_PRICE 

WHEN 'SMALL' THEN @PRICE_SMALL_PRICE 

ELSE null 

END); 



SELECT @ITEM_PRICE;

Any help is appreciated.

asked Nov 21 '18 at 15:30

PCG

112211

add a comment |

The following script works fine. But I want to write it in one line rather than three lines. 'Size" is passed from my main program and its used here to test. Simply I want to get Price based on size.

Table columns :
LISTING_ID, PRICE_LARGE_PRICE, PRICE_SMALL_PRICE.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,PRICE_SMALL_PRICE

INTO

    @PRICE_LARGE_PRICE,@PRICE_SMALL_PRICE

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;



SET @ITEM_PRICE = (CASE @Size WHEN 'REGULAR' THEN @PRICE_LARGE_PRICE 

WHEN 'SMALL' THEN @PRICE_SMALL_PRICE 

ELSE null 

END); 



SELECT @ITEM_PRICE;

Any help is appreciated.

asked Nov 21 '18 at 15:30

PCG

112211

add a comment |

The following script works fine. But I want to write it in one line rather than three lines. 'Size" is passed from my main program and its used here to test. Simply I want to get Price based on size.

Table columns :
LISTING_ID, PRICE_LARGE_PRICE, PRICE_SMALL_PRICE.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,PRICE_SMALL_PRICE

INTO

    @PRICE_LARGE_PRICE,@PRICE_SMALL_PRICE

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;



SET @ITEM_PRICE = (CASE @Size WHEN 'REGULAR' THEN @PRICE_LARGE_PRICE 

WHEN 'SMALL' THEN @PRICE_SMALL_PRICE 

ELSE null 

END); 



SELECT @ITEM_PRICE;

Any help is appreciated.

asked Nov 21 '18 at 15:30

PCG

112211

The following script works fine. But I want to write it in one line rather than three lines. 'Size" is passed from my main program and its used here to test. Simply I want to get Price based on size.

Table columns :
LISTING_ID, PRICE_LARGE_PRICE, PRICE_SMALL_PRICE.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,PRICE_SMALL_PRICE

INTO

    @PRICE_LARGE_PRICE,@PRICE_SMALL_PRICE

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;



SET @ITEM_PRICE = (CASE @Size WHEN 'REGULAR' THEN @PRICE_LARGE_PRICE 

WHEN 'SMALL' THEN @PRICE_SMALL_PRICE 

ELSE null 

END); 



SELECT @ITEM_PRICE;

Any help is appreciated.

mysql select case case-when

asked Nov 21 '18 at 15:30

PCG

112211

asked Nov 21 '18 at 15:30

PCG

112211

asked Nov 21 '18 at 15:30

PCG

112211

asked Nov 21 '18 at 15:30

PCG

112211

asked Nov 21 '18 at 15:30

PCG

112211

add a comment |

2 Answers
2

active

oldest

votes

Following may work.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,

    PRICE_SMALL_PRICE, 

    CASE WHEN @Size = 'REGULAR' THEN PRICE_LARGE_PRICE

         WHEN @Size = 'SMALL' THEN PRICE_SMALL_PRICE

    END AS ITEM_PRICE 

INTO

    @PRICE_LARGE_PRICE,

    @PRICE_SMALL_PRICE, 

    @ITEM_PRICE 

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

add a comment |

I think you want

SELECT 

  IF(@size == 'SMALL', PRICE_SMALL_PRICE, PRICE_LARGE_PRICE) AS ITEM_PRICE 

FROM prices;

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

Following may work.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,

    PRICE_SMALL_PRICE, 

    CASE WHEN @Size = 'REGULAR' THEN PRICE_LARGE_PRICE

         WHEN @Size = 'SMALL' THEN PRICE_SMALL_PRICE

    END AS ITEM_PRICE 

INTO

    @PRICE_LARGE_PRICE,

    @PRICE_SMALL_PRICE, 

    @ITEM_PRICE 

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

add a comment |

Following may work.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,

    PRICE_SMALL_PRICE, 

    CASE WHEN @Size = 'REGULAR' THEN PRICE_LARGE_PRICE

         WHEN @Size = 'SMALL' THEN PRICE_SMALL_PRICE

    END AS ITEM_PRICE 

INTO

    @PRICE_LARGE_PRICE,

    @PRICE_SMALL_PRICE, 

    @ITEM_PRICE 

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

add a comment |

Following may work.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,

    PRICE_SMALL_PRICE, 

    CASE WHEN @Size = 'REGULAR' THEN PRICE_LARGE_PRICE

         WHEN @Size = 'SMALL' THEN PRICE_SMALL_PRICE

    END AS ITEM_PRICE 

INTO

    @PRICE_LARGE_PRICE,

    @PRICE_SMALL_PRICE, 

    @ITEM_PRICE 

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

Following may work.

SET @Size = 'SMALL';



SELECT 

    PRICE_LARGE_PRICE,

    PRICE_SMALL_PRICE, 

    CASE WHEN @Size = 'REGULAR' THEN PRICE_LARGE_PRICE

         WHEN @Size = 'SMALL' THEN PRICE_SMALL_PRICE

    END AS ITEM_PRICE 

INTO

    @PRICE_LARGE_PRICE,

    @PRICE_SMALL_PRICE, 

    @ITEM_PRICE 

FROM

    prices

WHERE

    PRICE_LISTING_ID = 60;

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

answered Nov 21 '18 at 19:42

Madhur Bhaiya

19.6k62236

add a comment |

I think you want

SELECT 

  IF(@size == 'SMALL', PRICE_SMALL_PRICE, PRICE_LARGE_PRICE) AS ITEM_PRICE 

FROM prices;

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

add a comment |

I think you want

SELECT 

  IF(@size == 'SMALL', PRICE_SMALL_PRICE, PRICE_LARGE_PRICE) AS ITEM_PRICE 

FROM prices;

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

add a comment |

I think you want

SELECT 

  IF(@size == 'SMALL', PRICE_SMALL_PRICE, PRICE_LARGE_PRICE) AS ITEM_PRICE 

FROM prices;

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

I think you want

SELECT 

  IF(@size == 'SMALL', PRICE_SMALL_PRICE, PRICE_LARGE_PRICE) AS ITEM_PRICE 

FROM prices;

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

edited Nov 22 '18 at 15:07

PCG

112211

edited Nov 22 '18 at 15:07

PCG

112211

edited Nov 22 '18 at 15:07

PCG

112211

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

answered Nov 21 '18 at 17:10

Evert

41.3k1570125

add a comment |

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