row_number() over (partition by deptno order)

  
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.

Related examples in the same category

1.	ROW_NUMBER(): return a number with each row in a group, starting at 1
2.	ROW_NUMBER function with an ordering on salary in descending order
3.	More Than One Analytical Function May Be Used in a Single Statement ROW_NUMBER(), RANK(), DENSE_RANK()
4.	ROW_NUMBER() with order in descending order
5.	Rank() with nulls last
6.	row_number over partition by and order by
7.	Sum over and row_number() over
8.	Decode the result from row_number over, partition by, order by
9.	Open a cursor created by using row_number function
10.	Create a view based on row_number function

row_number() over (partition by deptno order) : ROW_NUMBER « Analytical Functions « Oracle PL / SQL

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