我想找出员工表中的经理

Question

ENAME      JOB       DNAME                 MGR      EMPNO
---------- --------- -------------- ---------- ----------
CLARK      MANAGER   ACCOUNTING           7839       7782
KING       PRESIDENT ACCOUNTING                      7839
MILLER     CLERK     ACCOUNTING           7782       7934
JONES      MANAGER   RESEARCH             7839       7566
FORD       ANALYST   RESEARCH             7566       7902
ADAMS      CLERK     RESEARCH             7788       7876
SMITH      CLERK     RESEARCH             7902       7369
SCOTT      ANALYST   RESEARCH             7566       7788
WARD       SALESMAN  SALES                7698       7521
TURNER     SALESMAN  SALES                7698       7844
ALLEN      SALESMAN  SALES                7698       7499
JAMES      CLERK     SALES                7698       7900
BLAKE      MANAGER   SALES                7839       7698
MARTIN     SALESMAN SALES                 7698       7654

从上表中我想知道来自智者的empname和他们的经理名字。 我有两个表，一个是emp表，另一个表是dept通过执行以下查询我带来了上面的结果。

SQL> select ename, job, dname, mgr, empno 
     from emp e, dept d
     where d.deptno = e.deptno;  

Answer 1

SQL> select e.ename emp_name, e.empno, e.job, m.ename mng_name,m.empno mng_empno
, dname from emp e, emp m, dept d where e.deptno = d.deptno and m.empno(+) = e.m
gr;