SQL Server GROUP BY datetime忽略小时分钟，并选择一个日期和总和值 [英] SQL Server GROUP BY datetime ignore hour minute and a select with a date and sum value

问题描述

我有一个两个字段的表 - datetime 和 int 。我只想在忽略小时和分钟的日期在 datetime 上进行一个组。 SELECT 语句应该返回映射到一天内的int的总和的日期。

I have a table with two fields - datetime and int. I want to do a group by on the datetime only on the date ignoring the hour and minute. The SELECT statement should return a date that maps to the sum of the int of a single day.

推荐答案

SELECT CAST(Datetimefield AS DATE) as DateField, SUM(intfield) as SumField
FROM MyTable
GROUP BY CAST(Datetimefield AS DATE)

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