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Asked: 2026-05-12T07:39:45+00:00

I have a Select like the one below in a stored procedure (shortened for

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I have a Select like the one below in a stored procedure (shortened for brevity). @param is a parameter to the stored procedure which can be NULL.

SELECT name FROM Table1 WHERE EXISTS (select …. from table2 Where param = @param AND … AND …) AND … AND …

I would like the EXISTS statement (the part in bold) to be used only when @param has a value otherwise ignore it.

I don’t want to use dynamic SQL or temporary tables if possible. I am trying to use a CASE statement to work with the EXISTS statement but with not much luck.

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1 Answer

  1. Editorial Team
    WHERE (@Param IS NULL OR EXISTS (SELECT .... ))

    Note that this isn’t a guarantee – the query optimizer will do what it wants. But is should be smart enough to optimize the exists clause away.

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