NewB Q on Arrays.

Hey All, I'm still a newB in php and mysql so I'm asking for your patience up front. i want to get a list of results from an array, which I can do with: $result=mysql_query("select * from mvlogtbl",$db); while ($row=mysql_fetch_array($result)){ echo "$row[uid] $row[mvid]"; } basically what I have is a database of movies linked to .avi files that are setup for streaming, the table mvlogtbl keeps a log of who has watched what. What i want to be able to do is determine if a certain user has watched a movie. But there are multiple entries for each user, a user may have watched the movie more than once, I don't really care, I just want to be able to tell if they have watched it or not... any help? Thanls - paul -