如何从MySQL中的日期时间中减去小时? [英] How to subtract hours from a datetime in MySQL?
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问题描述
我得到一个datetime字段,该字段当前在查询中为:
I get a datetime field, that's currently in the query as:
SELECT DATE_FORMAT(x.date_entered, '%Y-%m-%d') AS date FROM x ORDER BY date ASC
我要从该日期减去3个小时(格林尼治标准时间问题),但是我无法在PHP中执行此操作,因为PHP仅知道日期部分,而不是时间.
What I want to do is to subtract 3 hours from that date (GMT issues), but I can't do it in PHP as PHP only knows the date part, not the time.
推荐答案
mySQL has DATE_SUB()
:
SELECT DATE_SUB(column, INTERVAL 3 HOUR)....
但是尝试解决潜在的时区问题会更好吗?
but would it not be better to try and sort out the underlying time zone issue instead?
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