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sql where statement

Posted on 2014-01-31
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Last Modified: 2014-01-31
HI, NEED THIS TO WORK, PLEASE HELP



DECLARE @sumthing

SELECT * FROM table1
WHERE
    CASE WHEN @sumtin = 1
       THEN (table1.field1 IN ('A', 'B', 'AH') )
       ELSE (table1.field1 NOT IN ('A', 'B', 'AH') ) END
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Question by:Ess Kay
4 Comments
 
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Accepted Solution

by:
Surendra Nath earned 1600 total points
ID: 39825310
you need to write it as below

DECLARE @sumthing

SELECT * FROM table1
WHERE (@sumtin = 1 and (table1.field1 IN ('A', 'B', 'AH') ))
or (@sumtin <> 1 and (table1.field1 NOT IN ('A', 'B', 'AH'))

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LVL 46

Assisted Solution

by:Kent Olsen
Kent Olsen earned 400 total points
ID: 39825314
Hi esskay,

CASE returns a single value so the structure that you've defined isn't legal SQL.

But you can do it without the CASE construct.

SELECT * FROM table1
WHERE
    (@sumtin = 1 AND table1.field1 IN ('A', 'B', 'AH') )
OR (@sumtin <> 1 AND table1.field1 NOT IN ('A', 'B', 'AH') )


That should do the trick for you.

Good Luck,
Kent
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LVL 66

Expert Comment

by:Jim Horn
ID: 39825317
The above answer is correct.  CASE blocks work great, but in a WHERE clause it's more (effective, easier to read, ??) just to use logical expressions like AND or OR, and parentheses to set the execution.
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LVL 15

Author Closing Comment

by:Ess Kay
ID: 39825329
Thanks, not enough coffee today
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