oracle各種連結介绍(+)
oracle各種連結介绍SQL> select * from a1;BBB----------101102103104105SQL> select * from a2;BBB CCC---------- --------------------101102105SQL> select * from a1,a2 where a1.bbb(+)=a2.bbb; 右連結BBB BBB CCC---------- ---------- ----------------...
