This is probably a stupid question, but ...
I'd like to be able to take an existing query and modify it to return a single row if that's what the base query returns, and 0 rows if the base query returns multiple rows. Similarly, I'd like to also modify it to return multiple rows if that's what the base query returns, and 0 rows if the base query return a single row.
What's a good way to do this?
Thanks, Kevin Murphy
---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
