Oracle Analytic Function - Oracle/PLSQL PERCENTILE_DISC Function






PERCENTILE_DISC(x) checks the cumulative distribution values in a group until it finds one that is greater than or equal to x. PERCENTILE_DISC(x) operates in a reversed manner of CUME_DIST().

Example


CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
                  ENAME VARCHAR2(10),
                  JOB VARCHAR2(9),
                  SAL NUMBER(7, 2),
                  DEPTNO NUMBER(2));
-- from   w ww.j av a 2 s.  c  om
INSERT INTO EMP VALUES (1, 'SMITH', 'CLERK',     800,    20);
INSERT INTO EMP VALUES (2, 'ALLEN', 'SALESMAN', 1600,    30);
INSERT INTO EMP VALUES (3, 'WARD',  'SALESMAN', 1250,    30);
INSERT INTO EMP VALUES (4, 'JONES', 'MANAGER',  2975,    20);
INSERT INTO EMP VALUES (5, 'MARTIN','SALESMAN', 1250,    30);
INSERT INTO EMP VALUES (6, 'BLAKE', 'MANAGER',  2850,    30);
INSERT INTO EMP VALUES (7, 'CLARK', 'MANAGER',  2850,    10);
INSERT INTO EMP VALUES (8, 'SCOTT', 'ANALYST',  3000,    20);
INSERT INTO EMP VALUES (9, 'KING',  'PRESIDENT',3000,    10);
INSERT INTO EMP VALUES (10,'TURNER','SALESMAN', 1500,    30);
INSERT INTO EMP VALUES (11,'ADAMS', 'CLERK',    1500,    20);

SQL> SELECT
  2  PERCENTILE_DISC(0.6) WITHIN GROUP (ORDER BY SUM(sal) DESC)
  3  AS percentile_disc
  4  FROM emp
  5  GROUP BY deptno;

PERCENTILE_DISC
---------------
           8275

SQL>