Monday, July 10, 2006

Subquery

Multiple row subqry
===================
SQL> SELECT *
2 FROM emp e
3 WHERE e.sal IN (SELECT e1.sal
4 FROM emp e1
5 WHERE e1.deptno = 10);

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
--------------- ---------- --------- --------------- --------- --------------- --------------- -----
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7839 KING PRESIDENT 17-NOV-81 5000 10
7934 MILLER CLERK 7782 23-JAN-82 1300 10

SQL> SELECT *
2 FROM emp e
3 WHERE e.sal > any (SELECT e1.sal
4 FROM emp e1
5 WHERE e1.deptno = 10);

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
--------------- ---------- --------- --------------- --------- --------------- --------------- -----
7839 KING PRESIDENT 17-NOV-81 5000 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7566 JONES MANAGER 7839 02-APR-81 2975 20
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30

8 rows selected.

SQL> SELECT *
2 FROM emp e
3 WHERE e.sal > all (SELECT e1.sal
4 FROM emp e1
5 WHERE e1.deptno = 10);

no rows selected

SQL> SELECT *
2 FROM emp e
3 WHERE e.sal < all (SELECT e1.sal
4 FROM emp e1
5 WHERE e1.deptno = 10);

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
--------------- ---------- --------- --------------- --------- --------------- --------------- -----
7369 SMITH CLERK 7902 17-DEC-80 800 20
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30

SQL> ed
Wrote file afiedt.buf

1 SELECT *
2 FROM emp e
3 WHERE e.sal < any (SELECT e1.sal
4 FROM emp e1
5* WHERE e1.deptno = 10)
SQL> /

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
--------------- ---------- --------- --------------- --------- --------------- --------------- -----
7369 SMITH CLERK 7902 17-DEC-80 800 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7934 MILLER CLERK 7782 23-JAN-82 1300 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7902 FORD ANALYST 7566 03-DEC-81 3000 20

13 rows selected.



=================================================
Employees report to BLAKE
=================================================

SELECT *
FROM emp e1
WHERE e1.mgr = (SELECT e.empno
FROM emp e
WHERE e.ename = 'BLAKE')





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