外连接
例子:
SQL> select * from a1;BBB
----------
101
102
103
104
105SQL> select * from a2;BBB CCC
---------- --------------------
101
102
105SQL> select * from a1,a2 where a1.bbb(+)=a2.bbb;BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
105 105SQL> select * from a1,a2 where a1.bbb=a2.bbb(+);BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
103
104
105 105SQL>
例子:
SQL> select * from a1;BBB
----------
101
102
103
104
105SQL> select * from a2;BBB CCC
---------- --------------------
101
102
105SQL> select * from a1,a2 where a1.bbb(+)=a2.bbb;BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
105 105SQL> select * from a1,a2 where a1.bbb=a2.bbb(+);BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
103
104
105 105SQL>
例子:
SQL> select * from a1;BBB
----------
101
102
103
104
105SQL> select * from a2;BBB CCC
---------- --------------------
101
102
105SQL> select * from a1,a2 where a1.bbb(+)=a2.bbb;BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
105 105SQL> select * from a1,a2 where a1.bbb=a2.bbb(+);BBB BBB CCC
---------- ---------- --------------------
101 101
102 102
103
104
105 105SQL>