按天分组的 SQL 查询

SQL query to group by day(按天分组的 SQL 查询)
本文介绍了按天分组的 SQL 查询的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想列出所有销售额,并按天分组.

I want to list all sales, and group the sum by day.

Sales (saleID INT, amount INT, created DATETIME)

注意:我使用的是 SQL Server 2005.

NOTE: I am using SQL Server 2005.

推荐答案

如果您使用的是 SQL Server,

if you're using SQL Server,

dateadd(DAY,0, datediff(day,0, created)) 将返回创建日期

例如,如果销售创建于2009-11-02 06:12:55.000",dateadd(DAY,0, datediff(day,0, created)) return '2009-11-02 00:00:00.000'

for example, if the sale created on '2009-11-02 06:12:55.000', dateadd(DAY,0, datediff(day,0, created)) return '2009-11-02 00:00:00.000'

select sum(amount) as total, dateadd(DAY,0, datediff(day,0, created)) as created
from sales
group by dateadd(DAY,0, datediff(day,0, created))

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