After seeing my one millionth question with the tag SQL and no tag for DBMS, I'm starting to wonder if anyone else thinks this would be a nice feature. This would probably only apply to Stack Overflow. 

It seems like it is a common problem when people post SQL questions and it can be difficult to answer without that specified. If not required, would it be possible to pop up a little reminder saying that they should add a tag for what DBMS it is for?