Ignoring a NULL parameter in T-SQL

Question

I want to be able to pass in a list of parameters, and ignore the ones which are NULL. So that the query is in effect pretending that the filter isn\'t there and ignoring it

Answer 1

I would handle it this way.

WHERE Thing = ISNULL(@Thing, Thing)

If you're just using the parameter as a filter on the where clause, this will work very well. It will ignore the parameter if it is null.