PostgreSQL的window函数整理(6)

来源：未知责任编辑：责任编辑发表时间:2015-09-17 09:42　点击:次

3 | sales | 4 | 4800 | 2007-08-08

(11 rows)

postgres=# select percent_rank() over(partition by depname order by salary desc),* from empsalary;

percent_rank | depname | empno | salary | enroll_date

-------------------+-----------+-------+--------+-------------

0 | develop | 8 | 6000 | 2006-10-01

0.25 | develop | 10 | 5200 | 2007-08-01

0.25 | develop | 11 | 5200 | 2007-08-15

0.75 | develop | 9 | 4500 | 2008-01-01

1 | develop | 7 | 4200 | 2008-01-01

0 | personnel | 2 | 3900 | 2006-12-23

1 | personnel | 5 | 3500 | 2007-12-10

0 | sales | 6 | 5500 | 2007-01-02

0.333333333333333 | sales | 1 | 5000 | 2006-10-01

0.666666666666667 | sales | 3 | 4800 | 2007-08-01

0.666666666666667 | sales | 4 | 4800 | 2007-08-08

(11 rows)

postgres=# select cume_dist()over(partition by depname order by salary desc),* from empsalary; www.2cto.com

cume_dist | depname | empno | salary | enroll_date

-----------+-----------+-------+--------+-------------

0.2 | develop | 8 | 6000 | 2006-10-01

0.6 | develop | 10 | 5200 | 2007-08-01

0.6 | develop | 11 | 5200 | 2007-08-15

0.8 | develop | 9 | 4500 | 2008-01-01

1 | develop | 7 | 4200 | 2008-01-01

0.5 | personnel | 2 | 3900 | 2006-12-23

1 | personnel | 5 | 3500 | 2007-12-10

0.25 | sales | 6 | 5500 | 2007-01-02

0.5 | sales | 1 | 5000 | 2006-10-01