Question

$line = @mysql_query("SELECT * FROM clips, userclips 
WHERE userclips.userid='$id' AND 
userclips.clipid=clips.id ORDER BY clips.title");

Which returns all the clips associated with a particular user. However I’m stumped trying to write a query that will do the exact opposite; select all clips that aren’t associated with that user.

I have tried this:

$line = @mysql_query("SELECT DISTINCT * FROM clips, userclips 
WHERE userclips.userid!='$id' AND userclips.clipid=clips.id ORDER BY clips.title");

Which does return clips not associated with that user, however it misses clips that aren’t associated with any users.

Please help if you can 🙂

Answer 1

 $line = @mysql_query("SELECT DISTINCT * FROM clips WHERE clips.id 
 NOT IN (SELECT clipid FROM userclips WHERE userid='$id') ORDER BY clips.title");