如何从当前时间戳获取过去 24 小时?

问题描述

我正在尝试提取过去 24 小时内的所有数据，但从当前时间开始.如果当前日期时间是 5/3，时间是 11:30，那么我想从 11:30 拉过去 24 小时.日期字段的数据类型是 datetime，它只有日期和时间值，没有秒.这是我当前的查询

I am trying to pull all data for the last 24 hours but starting from the current time. If the current date-time is 5/3 and the time is 11:30 then i want to pull the last 24 hours from 11:30. The data type for date field is datetime and it has only the date and time values without the seconds. Here is my current query

select Name, Location, myDate from myTable where myDate>= getdate()-24

上面的查询给了我一切，但我只想要当前时间.这是表中 myDate 的样子

the query above is giving me everything but i only want from the current time. this is how myDate look like in the table

 2015-03-05 10:30:00.000
2015-03-05 11:00:00.000
2015-03-05 11:30:00.000
2015-03-05 12:00:00.000
2015-03-05 12:30:00.000
2015-03-05 13:00:00.000
2015-03-05 13:30:00.000
2015-03-05 14:00:00.000
2015-03-05 14:30:00.000

推荐答案

为了更明确地表达您的意图，您可能希望这样编写查询:

To be more explicit with your intentions, you may want to write your query like so:

 select Name, Location, myDate from myTable where myDate>= DATEADD(hh, -24, GETDATE())

SQL Server DATEADD

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