oracle 10g 里面有scott用户
alter user scott account unlock ;
使用 scott 密码 tiger 进入，修改密码，改用户有emp 表；
rank函数 ：
SELECT deptno, job, SUM(sal),
RANK() OVER(PARTITION BY deptno ORDER BY
SUM(sal) DESC)
AS jobdep_rank,RANK() OVER(ORDER BY SUM(sal) DESC) AS sumsal_rank
FROM emp
GROUP BY deptno, job ;
| DEPTNO | JOB | SUM(SAL) | JOBDEP_RANK | SUMSAL_RANK |
| 20 | ANALYST | 6000 | 1 | 1 |
| 30 | SALESMAN | 5600 | 1 | 2 |
| 10 | PRESIDENT | 5000 | 1 | 3 |
| 20 | MANAGER | 2975 | 2 | 4 |
| 30 | MANAGER | 2850 | 2 | 5 |
| 10 | MANAGER | 2450 | 2 | 6 |
| 20 | CLERK | 1900 | 3 | 7 |
| 10 | CLERK | 1300 | 3 | 8 |
| 30 | CLERK | 950 | 3 | 9 |
cume_dist
SELECT deptno, job, SUM(sal),
CUME_DIST() OVER(PARTITION BY deptno ORDER BY
SUM(sal) DESC)
AS cume_dist_per_dep
FROM emp
GROUP BY deptno, job
ORDER BY deptno, SUM(sal);
| DEPTNO | JOB | SUM(SAL) | CUME_DIST_PER_DEP |
| 10 | CLERK | 1300 | 1 |
| 10 | MANAGER | 2450 | 0.666667 |
| 10 | PRESIDENT | 5000 | 0.333333 |
| 20 | CLERK | 1900 | 1 |
| 20 | MANAGER | 2975 | 0.666667 |
| 20 | ANALYST | 6000 | 0.333333 |
| 30 | CLERK | 950 | 1 |
| 30 | MANAGER | 2850 | 0.666667 |
| 30 | SALESMAN | 5600 | 0.333333 |
有了这两个有用的函数，排名和百分比很快就能得到了吧。
时间： 2024-10-13 17:23:22