Does using a union count as one query? select a from tst_1 where b is null union select d from tst_2 t2 join tst_1 t1 on (t1.b = t2.c) where t1.b is NOT null
On Thu, Aug 28, 2003 at 05:55:27PM -0400, Williams, Travis L, NEO wrote: > Question, > > I have a table (1) with 2 col (a & b) where b can sometimes be null. I > need a query that if B is null I get back the contents of A.. but if B > is not null I do a join on it and table (2) col c to get the contents > of table (2) col d.. I can do this in multiple queries.. but was > wondering if I could do it in 1. ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
