Get top n rows with rank
CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
SAL NUMBER(7, 2),
DEPTNO NUMBER(2));
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 * from (
2 select empno, ename, rank() over(order by sal desc) rank from emp
3 )
4 where rank < 3;
EMPNO ENAME RANK
---------- ---------- ----------
8 SCOTT 1
9 KING 1
SQL>
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RANK:
- RANK
- Place NULLS FIRST in RANK
- Place NULLS LAST in RANK
- Place NULLS LAST in RANK and order by clause
- Get top n rows with rank
- Using the RANK with group by
- RANK() vs DENSE_RANK() Functions
- RANK() and PARTITION BY
- ROLLUP and RANK
- CUBE and RANK
- GROUPING SETS and RANK
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