Jonas Lind?n <[EMAIL PROTECTED]> wrote: > Hello, I am running MySQL5.0.0 on my OpenBSD system. When I excute this > query I get 153 hits. > > SELECT b.batch_id, b.date, b.creator, b.comments FROM cd_batch as b; > > But when I add this table to the where clause i get 5831 hits > > SELECT b.batch_id, b.date, b.creator, b.comments FROM cd_batch as b, > cd_donor as d; > > Why does this happend? I thought that these two queries would return the > exact same amout of rows. Is there something I have forgotten or is the > debug release of 5.x.x errornous? >
You got in the result set cartesian product of cd_batch and cd_donor tables. -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Victoria Reznichenko / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
