本文带领大家通过5分钟了解MySQL5.7中union all用法的黑科技,需要的朋友可以参考下

union all在MySQL5.6下的表现 Part1:MySQL5.6.25 [rootHE1 ~]# MySQL -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.6.25-log MySQL Community Server (GPL) Copyright (c) 2000,