tally / count mysql每天的结果 [英] tally/count mysql results per day

问题描述

假设我有一个名为 signups 的mysql表，并具有以下值：

Lets say I have a mysql table called 'signups' with the following values:

Name            Signup Date
dog            2008-05-14 18:53:30
cat            2008-05-14 12:13:20
mouse          2008-05-14 08:51:32
giraffe        2008-05-15 22:13:31
Moose          2008-05-16 13:20:30
monkey         2008-05-16 08:51:32
mongoose       2008-05-16 22:13:31
fish           2008-05-16 13:00:30

我想生成一份报告，说明每天有多少动物注册（我不在乎时间）。所以我从上面的例子表中寻找的最终结果是：

I want to generate a report for how many animals signed up for each DAY (I don't care about the time of day). So the end result of what I'm looking for from the above example table is:

Date              Signups
2008-05-14         3
2008-05-15         1
2008-05-16         4

有没有办法在mysql中这样做，或者我需要使用另一种语言，如PHP来计算总和？

Is there a way to do this in mysql, or do I need to involve another language like PHP to calculate totals?

任何想法都赞赏， p>

Any ideas are appreciated, thanks

推荐答案

SELECT  DATE(Signup_Date) AS `Date`
        , COUNT(*) AS Signups 
FROM    `signups` 
GROUP BY 
        DATE(Signup_Date)

会为您提供您所期待的内容。

will give you exactly what you're after.

这篇关于tally / count mysql每天的结果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！