Bob Pawley <rjpawley@xxxxxxx> writes: > insert into p_id.loops (monitor) values (new.devices_id) > where new.device_number = library.devices.device_number > and library.devices.type_ = 'mon' ; Huh? How did library.devices get into this? Are you trying to join to it, and if so why, seeing that the value you want to insert into p_id.loops is independent of that table? regards, tom lane