求列最高薪水5人及其他的SQL写法.

求列最高薪水5人及其他的SQL写法.

有表emp:
name       sal
---------------
SMITH        800
ALLEN        1600
WARD        1250
JONES        2975
MARTIN        1250
BLAKE        2850
CLARK        2450
SCOTT        3000
KING        5000
TURNER        1500
ADAMS        1100
JAMES        950
FORD        3000
MILLER        1300
求一窗口函数能出以下结果:
name        sal           order
----------------------------------
KING        5000        1
SCOTT        3000        2
FORD        3000        3
JONES        2975        4
BLAKE        2850        5
other        12200        6
意思是,取sal最高的前五名,并把剩下的sal求和作为第六名.

虽然只用到了两列,为了省事就全导出来吧

create table EMP
(
  EMPNO    NUMBER,
  ENAME    VARCHAR2(10),
  JOB      VARCHAR2(10),
  MGR      NUMBER,
  HIREDATE DATE,
  SAL      NUMBER,
  COMM     NUMBER,
  DEPTNO   NUMBER
)
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7369, 'SMITH', 'CLERK', 7902, to_date('17-12-1980', 'dd-mm-yyyy'), 800, null, 20);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7499, 'ALLEN', 'SALESMAN', 7698, to_date('20-02-1981', 'dd-mm-yyyy'), 1600, 300, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7521, 'WARD', 'SALESMAN', 7698, to_date('22-02-1981', 'dd-mm-yyyy'), 1250, 500, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7566, 'JONES', 'MANAGER', 7839, to_date('02-04-1981', 'dd-mm-yyyy'), 2975, null, 20);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7654, 'MARTIN', 'SALESMAN', 7698, to_date('29-09-1981', 'dd-mm-yyyy'), 1250, 1400, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7698, 'BLAKE', 'MANAGER', 7839, to_date('01-05-1981', 'dd-mm-yyyy'), 2850, null, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7782, 'CLARK', 'MANAGER', 7839, to_date('09-06-1981', 'dd-mm-yyyy'), 2450, null, 10);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7788, 'SCOTT', 'ANALYST', 7566, to_date('09-12-1982', 'dd-mm-yyyy'), 3000, null, 20);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7839, 'KING', 'PRESIDENT', null, to_date('17-11-1981', 'dd-mm-yyyy'), 5000, null, 10);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7844, 'TURNER', 'SALESMAN', 7698, to_date('08-09-1981', 'dd-mm-yyyy'), 1500, 0, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7876, 'ADAMS', 'CLERK', 7788, to_date('12-01-1983', 'dd-mm-yyyy'), 1100, null, 20);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7900, 'JAMES', 'CLERK', 7698, to_date('03-12-1981', 'dd-mm-yyyy'), 950, null, 30);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7902, 'FORD', 'ANALYST', 7566, to_date('03-12-1981', 'dd-mm-yyyy'), 3000, null, 20);
insert into EMP (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7934, 'MILLER', 'CLERK', 7782, to_date('23-01-1982', 'dd-mm-yyyy'), 1300, null, 10);
commit;

Solution:

SELECT DECODE(SIGN(s - 6), -1, ename, 'other') ename,
       DECODE(SIGN(s - 6), -1, s, 6) s,
       SUM(sal) sal
FROM   (SELECT a.*, row_number() OVER(ORDER BY sal DESC,empno) s FROM emp a )
GROUP  BY DECODE(SIGN(s - 6), -1, ename, 'other'),
          DECODE(SIGN(s - 6), -1, s, 6)
ORDER  BY 2;
SQL>

ENAME               S        SAL
---------- ---------- ----------
KING                1       5000
SCOTT               2       3000
FORD                3       3000
JONES               4       2975
BLAKE               5       2850
other               6      12200