How to get a new column without using update(plz check with the requirment)

Question

write a query to display current sal and new sal for all employees
condition
if job='MANAGER' and deptno in (10,20) then make newsal increased by 15% to current salary.
if job !='MANAGER' and deptno in (10,20) then make newsal increased by 25% to current salary.

Answer 1

Hi,
Here's one way to do it:
SQL> select empno,ename,job,deptno,sal, case
  2              when job='MANAGER' and deptno in (10,20) then 1.15 * sal
  3              when job <>'MANAGER' and deptno in (10,20) then 1.25 * sal
  4              else
  5                  sal
  6              end as new_sal
  7  from emp            ;
     EMPNO ENAME      JOB           DEPTNO        SAL    NEW_SAL
      7369 SMITH      CLERK             20        800       1000
      7499 ALLEN      SALESMAN          30       1600       1600
      7521 WARD       SALESMAN          30       1250       1250
      7566 JONES      MANAGER           20       2975    3421,25
      7654 MARTIN     SALESMAN          30       1250       1250
      7698 BLAKE      MANAGER           30       2850       2850
      7782 CLARK      MANAGER           10       2450     2817,5
      7788 SCOTT      ANALYST           20       3000       3750
      7839 KING       PRESIDENT         10       5000       6250
      7844 TURNER     SALESMAN          30       1500       1500
      7876 ADAMS      CLERK             20       1100       1375
     EMPNO ENAME      JOB           DEPTNO        SAL    NEW_SAL
      7900 JAMES      CLERK             30        950        950
      7902 FORD       ANALYST           20       3000       3750
      7934 MILLER     CLERK             10       1300       1625
14 rows selected.
SQL>If your requirements aren't satisfied, let me know it.
Edited by: Manguilibè KAO on 18 janv. 2012 03:16