SQL Server - Case Statement resulting in NULL

I have a result set in my query that contains empty strings like ' '.  I would like to make those NULL in the select clause in my sql statement like this...


But when I do this I get this error...

None of the result expressions in a CASE specification can be NULL.

Is there a better way to accomplish what I'm after?

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try the NULLIF function

select NULLIF(Value,' ') as Value
from MyTable

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I suggest also trimming the value and testing for empty string instead:

select NULLIF( RTRIM(Value), '' ) as Value
from MyTable
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Microsoft SQL Server 2008

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