dense_rank() over ( partition by deptno order by sal desc )
SQL>
SQL>
SQL> CREATE TABLE EMP(
2 EMPNO NUMBER(4) NOT NULL,
3 ENAME VARCHAR2(10),
4 JOB VARCHAR2(9),
5 MGR NUMBER(4),
6 HIREDATE DATE,
7 SAL NUMBER(7, 2),
8 COMM NUMBER(7, 2),
9 DEPTNO NUMBER(2)
10 );
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 deptno,ename,sal,
2 row_number() over (partition by deptno order by sal desc) rn,
3 rank() over (partition by deptno order by sal desc ) rank,
4 dense_rank() over ( partition by deptno order by sal desc ) dense_rank
5 from emp
6 order by deptno, sal DESC
7 /
DEPTNO ENAME SAL RN RANK DENSE_RANK
---------- ---------- ---------- ---------- ---------- ----------
10 KING 5000 1 1 1
CLARK 2450 2 2 2
MILLER 1300 3 3 3
20 SCOTT 3000 1 1 1
FORD 3000 2 1 1
JONES 2975 3 3 2
ADAMS 1100 4 4 3
SMITH 800 5 5 4
30 BLAKE 2850 1 1 1
DEPTNO ENAME SAL RN RANK DENSE_RANK
---------- ---------- ---------- ---------- ---------- ----------
30 ALLEN 1600 2 2 2
TURNER 1500 3 3 3
MARTIN 1250 4 4 4
WARD 1250 5 4 4
JAMES 950 6 6 5
14 rows selected.
SQL>
SQL> update emp set sal = 3000 where ename = 'JONES';
1 row updated.
SQL>
SQL> select deptno,ename,sal,
2 row_number() over (partition by deptno order by sal desc) rn,
3 rank() over (partition by deptno order by sal desc ) rank,
4 dense_rank() over ( partition by deptno order by sal desc ) dense_rank
5 from emp
6 order by deptno, sal DESC
7 /
DEPTNO ENAME SAL RN RANK DENSE_RANK
---------- ---------- ---------- ---------- ---------- ----------
10 KING 5000 1 1 1
CLARK 2450 2 2 2
MILLER 1300 3 3 3
20 JONES 3000 1 1 1
SCOTT 3000 2 1 1
FORD 3000 3 1 1
ADAMS 1100 4 4 2
SMITH 800 5 5 3
30 BLAKE 2850 1 1 1
DEPTNO ENAME SAL RN RANK DENSE_RANK
---------- ---------- ---------- ---------- ---------- ----------
30 ALLEN 1600 2 2 2
TURNER 1500 3 3 3
WARD 1250 4 4 4
MARTIN 1250 5 4 4
JAMES 950 6 6 5
14 rows selected.
SQL>
SQL> drop table emp;
Table dropped.
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