Home >Database >Mysql Tutorial >按天去除重复数据,为0则取0,否则取最大的那个值_MySQL
按天去除重复数据,为0则取0,否则取最大的那个值_MySQL
- WBOYOriginal
- 2016-06-01 13:07:081063browse
测试数据：mysql> select * from t2;+----+--------+---------------------+------------+| id | userid | inputDate | infoStatus |+----+--------+---------------------+------------+| 1 | 1 | 2014-07-11 00:00:00 | 20013 | | 2 | 1 | 2014-07-11 00:00:00 | 0 | | 3 | 2 | 2014-07-12 00:00:11 | 20015 | | 4 | 2 | 2014-07-12 00:00:22 | 20013 | | 5 | 2 | 2014-07-14 00:00:00 | 0 | | 6 | 2 | 2014-07-15 00:00:00 | 20013 | | 7 | 2 | 2014-07-15 00:00:00 | 0 | | 8 | 2 | 2014-07-16 00:00:00 | 0 | | 9 | 2 | 2014-07-13 00:00:00 | 20013 | | 10 | 2 | 2014-07-13 00:00:00 | 0 | | 11 | 2 | 2014-07-14 00:00:00 | 0 | +----+--------+---------------------+------------+查询sql：select id,userid,date(inputDate) as date,max(infoStatus) as m,min(infoStatus) as i,if(min(infoStatus)=0,0,max(infoStatus)) as max from t2 where infoStatus = 0 or infoStatus <p> </p>
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：Failover with the MySQL Utilities – Part 1: mysqlrpladmin_MySQLNext article：Mysqladmin -help 命令_MySQL