Re: CASE with test on null field

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#555

From: Adalberto Baldini
Date: Thu, 20 Sep 2007 07:33

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Bill Todd wrote:
> When c.Descr is null you are concatenating it with a.desmov. Null
> concatenated with anything is null. Add a WHEN c.Descr IS NULL clause
> to the case statement and return a.desmov just as you do when c.Descr
> is an empty string.
> 
> 

Use of NULL  ,  IS NULL,  (IS NULL)  are not allowed in Case statement.

"The CASE expression is a conditional value expression that consists of 
a list of value expressions, .."

It only accepts value.

Adalberto

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