PostgreSQL学习手册(函数和操作符<二>)(5)
来源：未知 责任编辑：责任编辑 发表时间:2014-02-18 03:27 点击:次
interval '1 day' + interval '1 hour' interval '1 day 01:00'
+ timestamp '2001-09-28 01:00' + interval '23 hours' timestamp '2001-09-29 00:00'
+ time '01:00' + interval '3 hours' time '04:00'
- - interval '23 hours' interval '-23:00'
- date '2001-10-01' - date '2001-09-28' integer '3'
- date '2001-10-01' - integer '7' date '2001-09-24'
- date '2001-09-28' - interval '1 hour' timestamp '2001-09-27 23:00'
- time '05:00' - time '03:00' interval '02:00'
- time '05:00' - interval '2 hours' time '03:00'
- timestamp '2001-09-28 23:00' - interval '23 hours' timestamp '2001-09-28 00:00' www.2cto.com
- interval '1 day' - interval '1 hour' interval '23:00'
- timestamp '2001-09-29 03:00' - timestamp '2001-09-27 12:00' interval '1 day 15:00'
* interval '1 hour' * double precision '3.5' interval '03:30'
/ interval '1 hour' / double precision '1.5' interval '00:40'
2. 日期/时间函数：
函数
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