IF condition in a SELECT statement?


I want to put an if condition on a field in my SELECT statement as follows:

SELECT arb.custid,CustomerSub.tr_amount,
if (CustomerSub.tr_amount IS NULL)
      asr.Total_Due as OmniCurrBal
      tr_amount + asr.Total_Due as OmniCurBal

Can this be done?  It's giving me a syntax error on the first "IF" line.

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Guy Hengel [angelIII / a3]Billing EngineerCommented:
you mean:
SELECT arb.custid,CustomerSub.tr_amount,
CASE WHEN (CustomerSub.tr_amount IS NULL THEN asr.Total_Due ELSE tr_amount + asr.Total_Due END as OmniCurrBal 


SELECT arb.custid,CustomerSub.tr_amount,
ISNULL(tr_amount,0) + asr.Total_Due as OmniCurrBal

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How about a set of  extra fields based on a param?

e.g - ()
SELECT 1, 2 CASE WHEN param = true THEN 3, 4, 5 ......
any way to do this?
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Query Syntax

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