-1 
create table dpt (
  deptno number, 
  dname varchar2(10), 
  loc varchar2(7)
)

create table emp1 (
  empno number,
  ename VARCHAR2(10),
  desigantion varchar2(10),
  mgr number,
  deptno number
)

结果1：

111 ram analyst 444 10
222 mohan   clerk   333 20
333 hari    manager 111 10
444 manju   engineer222 30

结果2：

10  inventory   hyd
20  finance         bglr
30  hr          mumbai

现在内部加入这两个表：

select * from emp1  inner join dept on emp1.deptno=dept.deptno

结果：

111 ram analyst 444 10  10  inventory   hyd
222 mohan   clerk   333 20  20  finance bglr
333 hari    manager 111 10  10  inventory   hyd

是否正确？

4

2 回答 2

0

No. You will get four rows. Means entire rows in tables (If having a joining row in the other table as well) unless otherwise there is a filter to throw out.

See you data here

于 2013-08-05T17:37:04.253 回答
-1 
      select *.emp1,*.dept from emp1,dept when emp1.deptno=dept.deptno
于 2013-08-05T17:10:36.813 回答