I would expect that the speed problems are due to missing indices. Did you do proper indexing? If unsure, post your table structures and query. Stefan
Am Tuesday 20 July 2004 17:45 schrieb Edward Ritter: > I've got a task that's gonna require me to compare one table to another > and remove the rows from the first table that are found in the second > table that match email_address. > > I'm running 4.0.20a-nt-log. The first table has 10 colomns and about 50K > records, and the second table has 46 columns and has about 16K records. > > I've attempted a number of selects that just sat and hung the computer. > I know I must be doing something wrong. I figure I'll need to do a left > join on it, but I've not had much experience with joins as such and I > need a little assistance. > > Can anyone help me work this out? If you need more info, let me know. > > Ed -- Stefan Kuhn M. A. Cologne University BioInformatics Center (http://www.cubic.uni-koeln.de) Zülpicher Str. 47, 50674 Cologne Tel: +49(0)221-470-7428 Fax: +49 (0) 221-470-7786 My public PGP key is available at http://pgp.mit.edu -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
