On Tuesday 05 February 2002 9:59 am, Barry J. Wiegan wrote: > Hi, > > I'm trying to build a query to solve a fairly simple problem. > I have two tables (A and B) linked by a common ID. I want to > locate a specific record in A that is linked to two or more > records in B based on second field in B matching certain criteria. > I've tried every type of inner, outer, left, and right join > to accomplish this, but can't come up with anything that works. > > EG: Select * from A inner join B on A.ID=B.ID where B.Val='25' > and B.Val='35'; > > This will rturn zero matching records since B.Val can't > equal 25 and 35 at the same time.
SELECT * FROM A inner join B on A.ID = B.ID inner join B AS C on A.ID = C.ID where B.Val = '25' and C.val = '35'. Or something similar. I can't be bothered to open my SQL reference at the moment. :) (For the sake of completeness, it is worth realising that you would _often_ need to ensure that the row in B and C are not the same row... not necessary here, though as you know they aren't as B.val and C.val are different). --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
