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Question about setting up a simple expression in an SQL Join

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Frequent Contributor
Posts: 89

Question about setting up a simple expression in an SQL Join

I'm working in an SQL Join transformation in DI Studio, and need to make sure that all rows for one specific bank get the flag-variable set to "N".

Why can't I just map the BANK_ID and BANK_FLAG from the source table, into BANK_FLAG in the target table, then use the following expression?

if BANK_ID = "123456" then do;

  BANK_FLAG = "N";

end;

I also tried this:

case BANK_FLAG

     when BANK_ID = "123456" then "N"

     else BANK_FLAG

end;

I'd appreciate any aid on this rookie problem. Thanks for your time. Smiley Happy

Super User
Posts: 5,433

Re: Question about setting up a simple expression in an SQL Join

Posted in reply to TurnTheBacon

Well, these expression have errors, which you probably encountered!

IF-THEN-ELSE-logic belongs to the data step, not "permitted" in SQL.

A case statement should not end with a ;, that will end the whole CREATE VIEW/TABLE statement.

Is that correct that you already have a BANK_FLAG in the source table, and you just want to change it's value for a specific bank?

Data never sleeps
Frequent Contributor
Posts: 89

Re: Question about setting up a simple expression in an SQL Join

Thanks. Yes, that's correct. I know how to do it in user written code, but apparently not in an SQL Join expression.

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