Hi, Is there any way to force every row in a table to be unique without creating a unique key? My tables are fairly large (growing by a gig a day) and creating a primary key would basically double my disk usage. Thanks for your help, Steve Micallef ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])