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Select CASE Concatenation
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* Select CASE Concatenation
@ 2006-07-07 06:47 Phillip Smith <phillips@weatherbeeta.com.au>
  2006-07-07 08:44 ` Re: Select CASE Concatenation Aaron Bono <postgresql@aranya.com>
  0 siblings, 1 reply; 2+ messages in thread

From: Phillip Smith @ 2006-07-07 06:47 UTC (permalink / raw)
  To: pgsql-sql

Hi All - Smee again!

 

Two questions but they're unrelated so I'll make 2 posts to keep it clean!

 

Number one (and I think is the easier one).

 

I have a SELECT statement, part of which is a "Flags" column which is a CASE
function, but I need to be able to concatenate the results together.
Example: in the below, I need to be show both "@" and "K" if both of the
CASE blocks are true. Possible?

     <snip>

     CASE WHEN stkeoq(stock.code) = -1 THEN '@'

           WHEN stock.kit_pack = 'Y' THEN 'K'

     END AS "flags",

     <snip>

Note: "stkeoq" is a function

 

The actual CASE is going to end up with 7 individual tests and therefore 7
difference flags that I'll need to test and concatenate all the true ones.

 

Thanks,

-p



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^ permalink  raw  reply  [nested|flat] 2+ messages in thread

* Re: Select CASE Concatenation
  2006-07-07 06:47 Select CASE Concatenation Phillip Smith <phillips@weatherbeeta.com.au>
@ 2006-07-07 08:44 ` Aaron Bono <postgresql@aranya.com>
  0 siblings, 0 replies; 2+ messages in thread

From: Aaron Bono @ 2006-07-07 08:44 UTC (permalink / raw)
  To: Phillip Smith <phillips@weatherbeeta.com.au>; +Cc: pgsql-sql

On 7/7/06, Phillip Smith <phillips@weatherbeeta.com.au> wrote:
>
> I have a SELECT statement, part of which is a "Flags" column which is a
> CASE function, but I need to be able to concatenate the results together.
> Example: in the below, I need to be show both "@" and "K" if both of the
> CASE blocks are true… Possible?
>
>      <snip>
>
>      CASE WHEN stkeoq(stock.code) = -1 THEN '@'
>
>            WHEN stock.kit_pack = 'Y' THEN 'K'
>
>      END AS "flags",
>
>      <snip>
>
> Note: "stkeoq" is a function
>
>
>
> The actual CASE is going to end up with 7 individual tests and therefore 7
> difference flags that I'll need to test and concatenate all the true ones…
>

With a CASE you will need to provide all possible combinations.  But perhaps
there is a way to put the two separate CASE statements together with a ||
concatenation:

CASE WHEN stkeoq(stock.code) = -1 THEN '@'
ELSE ''
END
||
CASE WHEN stock.kit_pack = 'Y' THEN 'K'
ELSE ''
END
AS "flags"

Is this what you are looking for?

-Aaron Bono

^ permalink  raw  reply  [nested|flat] 2+ messages in thread

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2006-07-07 06:47 Select CASE Concatenation Phillip Smith <phillips@weatherbeeta.com.au>
2006-07-07 08:44 ` Aaron Bono <postgresql@aranya.com>

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