Question

pl / sql查询以通过deptno

查找经理名称

DECLARE
V_ENAME EMP.ENAME%TYPE; 
BEGIN 
FOR I IN (SELECT distinct  DEPTNO FROM EMP) 
LOOP 
SELECT ENAME INTO V_ENAME FROM EMP 
 WHERE JOB='MANAGER' AND DEPTNO=I.DEPTNO; 
DBMS_OUTPUT.PUT_LINE('THE NAME OF THE MANAGER IN '||I.DEPTNO||' IS '||V_ENAME);
END LOOP;
END;

Answer 1

工作正常

DECLARE
V_ENAME EMP.ENAME%TYPE; 
BEGIN 
FOR I IN (SELECT distinct  DEPTNO FROM EMP) 
LOOP 
SELECT ENAME INTO V_ENAME FROM EMP 
WHERE JOB='MANAGER' AND DEPTNO=I.DEPTNO; 
DBMS_OUTPUT.PUT_LINE('THE NAME OF THE MANAGER IN DEPARTMENT '||I.DEPTNO||' IS '||V_ENAME);
END LOOP;
END;

打印

THE NAME OF THE MANAGER IN DEPARTMENT 30 IS BLAKE THE NAME OF THE MANAGER IN DEPARTMENT 20 IS JONES THE NAME OF THE MANAGER IN DEPARTMENT 10 IS CLARK

Answer 2

由于我不知道这个线程的重点是什么，我将提供简单的SQL查询来执行问题中的问题 - 获取部门的deptno和管理器的名称（使用标量子查询）。

select d.deptno,
       (select e.ename
          from emp e
         where e.deptno = d.deptno
           and e.job = 'MANAGER') manager
  from dept d;

这里没有理由使用PL / SQL。

pl / sql查询通过deptno查找管理器名称

2 个答案: