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    2. MySQL查询GROUP BY日/月/年

      时间:2023-08-19
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              • 本文介绍了MySQL查询GROUP BY日/月/年的处理方法,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

                是否可以进行一个简单的查询来计算我在确定的时间段内(例如年、月或日)有多少记录,具有 TIMESTAMP 字段,例如:

                Is it possible to make a simple query to count how many records I have in a determined period of time like a year, month, or day, having a TIMESTAMP field, like:

                SELECT COUNT(id)
                FROM stats
                WHERE record_date.YEAR = 2009
                GROUP BY record_date.YEAR
                

                甚至:

                SELECT COUNT(id)
                FROM stats
                GROUP BY record_date.YEAR, record_date.MONTH
                

                要有月度统计数据.

                谢谢!

                推荐答案

                GROUP BY YEAR(record_date), MONTH(record_date)
                

                查看日期和时间MySQL 中的函数.

                这篇关于MySQL查询GROUP BY日/月/年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html5模板网!

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