Mega Code Archive
Decode the result from row_number over, partition by, order by
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SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, 'SMITH', 'CLERK', 7902, TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, 'JONES', 'MANAGER', 7839, TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, 'MARTIN', 'SALESMAN', 7698,TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, 'BLAKE', 'MANAGER', 7839,TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, 'CLARK', 'MANAGER', 7839,TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, 'SCOTT', 'ANALYST', 7566,TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, 'KING', 'PRESIDENT', NULL,TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, 'TURNER', 'SALESMAN', 7698,TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, 'ADAMS', 'CLERK', 7788,TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, 'JAMES', 'CLERK', 7698,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, 'FORD', 'ANALYST', 7566,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, 'MILLER', 'CLERK', 7782,TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7369.00 SMITH CLERK 7902.00 17-DEC-80 800.00 20
7499.00 ALLEN SALESMAN 7698.00 20-FEB-81 1600.00 300.00 30
7521.00 WARD SALESMAN 7698.00 22-FEB-81 1250.00 500.00
7566.00 JONES MANAGER 7839.00 02-APR-81 2975.00 20
7654.00 MARTIN SALESMAN 7698.00 28-SEP-81 1250.00 1400.00 30
7698.00 BLAKE MANAGER 7839.00 01-MAY-81 2850.00
7782.00 CLARK MANAGER 7839.00 09-JUN-81 2450.00 10
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7788.00 SCOTT ANALYST 7566.00 09-DEC-82 3000.00 20
7839.00 KING PRESIDENT 17-NOV-81 5000.00 10
7844.00 TURNER SALESMAN 7698.00 08-SEP-81 1500.00 .00 30
7876.00 ADAMS CLERK 7788.00 12-JAN-83 1100.00 20
7900.00 JAMES CLERK 7698.00 03-DEC-81 950.00 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
-------- ---------- --------- -------- --------- -------- -------- ------
7902.00 FORD ANALYST 7566.00 03-DEC-81 3000.00 20
7934.00 MILLER CLERK 7782.00 23-JAN-82 1300.00 10
14 rows selected.
SQL>
SQL>
SQL> set echo on
SQL>
SQL> select deptno,
2 max(decode(seq,1,ename,null)) highest_paid,
3 max(decode(seq,2,ename,null)) second_highest,
4 max(decode(seq,3,ename,null)) third_highest
5 from ( SELECT deptno, ename,
6 row_number() OVER
7 (PARTITION BY deptno
8 ORDER BY sal desc NULLS LAST ) seq
9 FROM emp )
10 where seq <= 3
11 group by deptno
12 /
DEPTNO HIGHEST_PA SECOND_HIG THIRD_HIGH
------ ---------- ---------- ----------
10 KING CLARK MILLER
20 SCOTT FORD JONES
30 BLAKE ALLEN TURNER
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL>
SQL>
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