如何从MySQL中的日期时间中减去小时?

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.

答

mySQL具有

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?