在5.7版本中注意group的用法：
use emp;
set sql_mode='';
select x.salary,x.department_id from
(select e.* from emp e order by department_id,salary desc) x group by x.department_id;
use emp;
set sql_mode='';
select x.salary,x.department_id from
(select e.* from emp e order by department_id,salary desc) x group by x.department_id;
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/29990276/viewspace-1872536/ ，如需转载，请注明出处，否则将追究法律责任。
请登录后发表评论
登录
全部评论
最新文章
- chrony /ˈkrɑːni/ vs ntpd 的核心区别
- LightDB新特性-Oracle模式支持回收站功能
- centos stream 8
- benchmarksql 压测MySQL报Every derived table must have its own alias解决
- LightDB-A gpfdist 命令初体验
- 数据库的sort group by和hash group by
- PostgreSQL citus常见报错问题分析（二）DETAIL: Distributed relations cannot have
- 事务可见性的判断和事务隔离级别，PostgreSQL和MySQL实现上有啥区别
- LightDB Canopy 常见报错问题分析（一）
- LightDB/postgresql内置特性之访问oracle之oracle_fdw介绍
