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

If the Thing (column value) is also Nullable, then use the foll. approach:

WHERE COALESCE(Thing,'')=COALESCE(@thing,Thing,'')