遍历时间 generate_series

http://www.linuxidc.com/Linux/2012-09/69670.htm

generate_series(start,stop)                --int or bigint

generate_series(start,stop,step)          --int or bigint

generate_series(start,stop, step interval) --timestamp or timestamp with time zone

SELECT generate_series(now(), now() + '10 day', '1 day')::DATE AS day;

2016-10-20

2016-10-21

2016-10-22

2016-10-23

2016-10-24

2016-10-25

2016-10-26

2016-10-27

2016-10-28

2016-10-29

2016-10-30

SELECT generate_series(1, 10, 2);

1

3

5

7

9

SELECT DATE (zz) FROM generate_series (date_trunc('day', to_date('20150305', 'yyyymm01') ), date_trunc('day', to_date('20150405', 'yyyymmdd') ), '1 day') AS tt (zz);

遍历当前月的各个天数

SELECT DATE (zz) as day FROM generate_series (date_trunc('day', to_date( to_char(now(), 'yyyymmdd'), 'yyyymm01') ), date_trunc('day', now() ), '1 day') AS tt (zz);