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how to  check whether a sql query have result or not using store procedure?

Posted on 2002-07-17
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how to  check whether a sql query have result or not using store procedure?

eg. Select * from table
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Question by:AStronus
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4 Comments
 
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Expert Comment

by:Paullkha
ID: 7160386
@@rowcount
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Scott Pletcher earned 800 total points
ID: 7160431
That is correct.  Be sure, though, to save the value if you intend to test anyplace after the very next line.  For example, this code won't work as expected:

SELECT * FROM table
SET @date = GETDATE()
IF @@ROWCOUNT > 0

The SET statement resets @@ROWCOUNT (to 1)!  So, if you need the value of @@ROWCOUNT later, do this:

DECLARE @rowcount INT
SELECT * FROM table
SET @rowcount = @@rowcount
SET @date = GETDATE()
IF @rowcount > 0

By the way, the same is true for @@ERROR.

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Author Comment

by:AStronus
ID: 7160676
that odd, i have test that before and it didn't work, now it work so weird
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LVL 69

Expert Comment

by:Scott Pletcher
ID: 7160706
Just be sure to do the save IMMEDIATELY after the SELECT (or INSERT or UPDATE or DELETE -- @@ROWCOUNT works for all) and it should work.  

Note that if you want to save BOTH @@ROWCOUNT and @@ERROR you have to save both in one line using a SELECT, like this:

DECLARE @error INT
DECLARE @rowcount INT

SELECT * FROM anyTable
SELECT @rowcount = @@ROWCOUNT, @error = @@ERROR
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