From: "Matt Babineau" <matt@criticalcode.com> > Got an interesting problem! I have a list of ID's, basically things > people have viewed on my website. When I pull the viewable items from my > database, I need to be able to filter out all the ID's people have > already viewed, so that they only get a list of things they have not > viewed. > > I can think of a way to do this, but it is a nasty loop situation, that > would probably not be good and tie up significant CPU time. Anyone have > any suggestions on ways to filter view items from a fresh list that I am > pulling from my Database? So you have a "thing_id" and a "user_id". How do you mark the user as having viewed the "thing"? I'm thinking a LEFT JOIN is in order here, but need some more info on your table structure. ---John Holmes... -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
