Home >Backend Development >PHP Tutorial >mysql求平均排队时长
mysql求平均排队时长
- WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOriginal
- 2016-06-06 20:08:521555browse
就是把所有的时间差相加 除以排队数 但是mysql怎么写呢
回复内容：
就是把所有的时间差相加 除以排队数 但是mysql怎么写呢
难道不是select sum(字段)/count(1) from table?
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：记录的统计数据，该使用数据库冗余字段还是即时查询，或者其他方式？Next article：thinkphp遍历截取字符串并输出到模板