drop table emp_halim;
CREATE TABLE emp_halim AS SELECT * FROM emp;
SET DEFINE OFF;
Insert into EMP_HALIM
(EMPNO, ENAME, JOB, MGR, HIREDATE,
SAL, COMM, DEPTNO)
Values
(7999, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
1300, NULL, 70);
Insert into EMP_HALIM
(EMPNO, ENAME, JOB, MGR, HIREDATE,
SAL, COMM, DEPTNO)
Values
(7989, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
1300, NULL, 60);
Insert into EMP_HALIM
(EMPNO, ENAME, JOB, MGR, HIREDATE,
SAL, COMM, DEPTNO)
Values
(7979, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
1300, NULL, 50);
COMMIT;
SELECT *
FROM emp_halim;
----------------------------------------------
drop table dept_halim;
CREATE TABLE dept_halim AS SELECT * FROM dept;
SELECT *
FROM dept_halim;
UPDATE emp_halim a
SET ename = (SELECT dname
FROM dept_halim b
WHERE a.deptno = b.deptno)
rollback ;
UPDATE emp_halim a
SET ename = (SELECT dname
FROM dept_halim b
WHERE a.deptno = b.deptno)
WHERE EXISTS (SELECT dname
FROM dept_halim b
WHERE a.deptno = b.deptno);
rollback;
Live examples:--
SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jul 12 18:27:34 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> conn scott@test107
Enter password:
Connected.
SQL>
SQL>
SQL> set linesize 1000
SQL> set pagesize 1000
SQL>
SQL> UPDATE emp_halim a
2 SET ename = (SELECT dname
3 FROM dept_halim b
4 /
FROM dept_halim b
*
ERROR at line 3:
ORA-00907: missing right parenthesis
SQL>
SQL> drop table emp_halim;
Table dropped.
SQL>
SQL>
SQL> CREATE TABLE emp_halim AS SELECT * FROM emp;
Table created.
SQL>
SQL>
SQL> SET DEFINE OFF;
SQL> Insert into EMP_HALIM
2 (EMPNO, ENAME, JOB, MGR, HIREDATE,
3 SAL, COMM, DEPTNO)
4 Values
5 (7999, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
6 1300, NULL, 70);
1 row created.
SQL> Insert into EMP_HALIM
2 (EMPNO, ENAME, JOB, MGR, HIREDATE,
3 SAL, COMM, DEPTNO)
4 Values
5 (7989, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
6 1300, NULL, 60);
1 row created.
SQL> Insert into EMP_HALIM
2 (EMPNO, ENAME, JOB, MGR, HIREDATE,
3 SAL, COMM, DEPTNO)
4 Values
5 (7979, 'halim', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
6 1300, NULL, 50);
1 row created.
SQL> COMMIT;
Commit complete.
SQL>
SQL>
SQL> SELECT *
2 FROM emp_halim;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 1000 20
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10
7999 halim CLERK 7782 23-JAN-82 1300 70
7989 halim CLERK 7782 23-JAN-82 1300 60
7979 halim CLERK 7782 23-JAN-82 1300 50
16 rows selected.
SQL>
SQL>
SQL>
SQL>
SQL>
SQL>
SQL> drop table dept_halim;
Table dropped.
SQL>
SQL>
SQL> CREATE TABLE dept_halim AS SELECT * FROM dept;
Table created.
SQL>
SQL> SELECT *
2 FROM dept_halim;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL>
SQL>
SQL>
SQL> UPDATE emp_halim a
2 SET ename = (SELECT dname
3 FROM dept_halim b
4 WHERE a.deptno = b.deptno);
16 rows updated.
SQL>
SQL> rollback ;
Rollback complete.
SQL>
SQL>
SQL>
SQL> UPDATE emp_halim a
2 SET ename = (SELECT dname
3 FROM dept_halim b
4 WHERE a.deptno = b.deptno)
5 WHERE EXISTS (SELECT dname
6 FROM dept_halim b
7 WHERE a.deptno = b.deptno);
13 rows updated.
SQL>
SQL>
SQL>
SQL>
SQL>
Halim is a Sr. Database Engineer/Data Architect (in Atlanta, USA) who is an Oracle certified (OCP) DBA, (OCP) Developer, Certified Cloud Architect Professional as well as OCI Autonomous DB specialist with extensive expertise in Database design, configuration, tuning, capacity planning, RAC, DG, Scripting, Python, PL/SQL etc. He achieved 16th position in worldwide first-ever PL/SQL Challenge cup playoff- http://plsql-challenge.blogspot.com/2010/07/winners-of-first-plsql-challenge.html
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2 comments:
nice post.
very nice post. thanksss . please continue.
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