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Optional Parameters in SELECT

Last Modified: 2011-09-20
I have a procedure:
@Category varchar(10),
@Section varchar(10),
@Search varchar(100)
SELECT * From CLS WHERE Category=@Category AND @Section=Section AND Description LIKE '%' + @Search + '%'

What I want to do is if nothing is put in for say @Category, then it ignores the entire Category=@Category portion.  I have tried using something like how I did the Description, but the problem with that is there are some Categories that have similar values, such as SLC and SLC1, so doing it that way sometimes returns SLC1 when I only wanted SLC. Any ways of doing this?
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