OK, so from what I can tell, the left join returns all Ads where there is no corresponding uid in Members, yes? (side note, try a foreign key with a cascading constraint to stop this from happening again). How about: DELETE FROM Ads where uid NOT IN (SELECT uid FROM Members) Try it as a select first to confirm it selects the right ones.
_____ From: Johnny Le Sent: Sat 9/04/2005 10:26 To: CF-Talk Subject: SQL question Hi, My database is a mess. The programmer who did this didn't delete all the user related records once the users deleted their accounts. So I am trying to clean up. I need to delete all records from the result of this select statement: SELECT a.uid FROM Ads a LEFT JOIN Members m ON (a.uid=m.uid) WHERE m.uid IS NULL How do I do that? I tried: DELETE FROM Ads where uid IN (SELECT a.uid FROM Ads a LEFT JOIN Members m ON (a.uid=m.uid) WHERE m.uid IS NULL) but that didn't work. Johnny ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:202092 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
