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When Parameter is be null?

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Topic

Sep410
Posting Yak Master

117 Posts

Posted - 2008-08-11 : 17:37:15

Hi all,
I know it may seem funny for you but I am really confused right now.
I have a select like this:
SELECT CaseID, CaseIDText, IntakeWorkerID
FROM dbo.tbl_Case
WHERE (CaseID = @Param1) AND (CaseIDText = @Param2)

Sometimes user may not enter a value for @param2 how can I handle it in my code. I think I should use like statement but I don’t know how.
I should use this code in my vb.net application.
Please help me.

Sep

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2008-08-11 : 17:43:02

Use the COALESCE function to handle it in the WHERE clause.

WHERE CaseID = COALESCE(@Param1, CaseID) AND CaseIDText = COALESCE(@Param2, CaseIDText)

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2008-08-12 : 03:04:44

or

WHERE (CaseID = @Param1 or @Param1 is null) AND (CaseIDText = @Param2 or @Param2 is null)

Madhivanan

Failing to plan is Planning to fail

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