Hi all.., This may be very simple but I guess I need experts help for the following in oracle 10g database :- select * from xx_case; pos_id case_id 2 C1 2 C2 select * from xx_box; pos_id box_id 2 B1 2 B2 The only common column between these two tables is pos_id. How do I write query from these two tables so that the output result would be pos_id case_id box_id 2 C1 B1 2 C2 B2 2 B3 2 B3 Thanks and Regards Krishan