In the FAQ, go down to this question/answer – what you have to do is to compute an intermediate variable, and build your WHERE on that.
Anita Craig 
(BOB member since 2002-06-17)
In the FAQ, go down to this question/answer – what you have to do is to compute an intermediate variable, and build your WHERE on that.
Anita Craig (BOB member since 2002-06-17)