pg 时间函数

操做符 例子 结果 + date '2015-09-28' + integer '7' date '20-10-05' + date '2001-09-28' + interval '1 hour' timestamp '2001-09-28 01:00' + date '2001-09-28' + time '03:00' timestamp '2001-09-28 03:00' + inter

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