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zz
Calcite | Level 5 zz
Calcite | Level 5

I have a sub-query as follows:

 

(SELECT D2.DSDECODED FROM DS_02 D2 WHERE D2.DSDECODED ="TREATMENT UNBLINDED" AND D.USUBJID=D2.USUBJID) AS DECODE

 

How do I program so, instead of DECODE taking the value of D2.DSDECODED(TREATMENT UNBLINDED), it now takes the value of either "YES", when D2.DSDECODED ="TREATMENT UNBLINDED", or

"NO", when D2.DSDECODED ="TREATMENT UNBLINDED" is false

 

Thank you in advance for your help!

1 ACCEPTED SOLUTION

Accepted Solutions
JediApprentice
Pyrite | Level 9

Maybe you could use a CASE statement? Although I'm not sure why you have WHERE D2.DSDECODED ="TREATMENT UNBLINDED". Don't you want to include records that aren't DSDECODED="TREATMENT UNBLINDED". In that case you could do something like this:

 

(SELECT 
  (CASE
    WHEN D2.DSDECODED="TREATMENT UNBLINDED" THEN "YES"
    ELSE "NO"
  END) AS DECODE
FROM DS_02 D2 WHERE D.USUBJID=D2.USUBJID)

 

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2 REPLIES 2
JediApprentice
Pyrite | Level 9

Maybe you could use a CASE statement? Although I'm not sure why you have WHERE D2.DSDECODED ="TREATMENT UNBLINDED". Don't you want to include records that aren't DSDECODED="TREATMENT UNBLINDED". In that case you could do something like this:

 

(SELECT 
  (CASE
    WHEN D2.DSDECODED="TREATMENT UNBLINDED" THEN "YES"
    ELSE "NO"
  END) AS DECODE
FROM DS_02 D2 WHERE D.USUBJID=D2.USUBJID)

 

zz
Calcite | Level 5 zz
Calcite | Level 5

Hi JediApprentice,

 

Thank you for the below suggestion!  The logic worked the way you have it.  

 

In terms of condition WHERE D2.DSDECODED ="TREATMENT UNBLINDED", if I have it, the code works to only set "YES" for the "DECODE" Flag, if removed, it evaluates to more than one row, breaking the code.

 

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