191问答库 > sql里datetime类型的数据如何加减修改

sql里datetime类型的数据如何加减修改

2025-03-15 12:31:37
推荐回答（2个）
回答1：

dateadd函数。具体用法查看sql帮助。
比如加7天，dateadd(dd,7,'2015-01-01 08:00:00')
减一个月，dateadd(mm,-1,'2015-01-01 08:00:00')

回答2：

日期用单引号引起来，日期字符串会被自动转换为datetime类型
比如
insert
into
表(时间列)
select
'2006-6-1
22:22:22'
就是把2006年6月1日22点22分22秒，插入到表中。

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