欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  数据库

按天去除重复数据,为0则取0,否则取最大的那个值_MySQL

程序员文章站 2022-06-05 14:49:08
...
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