Hi all. I've qot a problem I need to solve. I'm sure it's pretty simple; I just can't seem to get it, so here goes...
I've got a table, actually a view that joins 3 tables, that contains a phone number, a unique id, and a call duration. The phone number has duplicates in it but the unique id is unique. I need to get a list of distinct phone numbers and the coorisponding largest call duration. I've got the idea that this should be a self-join on phone number where a.id<>b.id, but I just can't seem to get the max duration. Any hints would be much appreciated. Mike. ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org