摘要: 3、select a.depart, group_concat("depart=",a.depart, ",price=", sum(a.salary)) from staff a group by a.depart; 4、以上可以更改为: 在网上看到一种说法:The SUM and AVG fun 阅读全文
posted @ 2016-09-27 14:02 慕橙-abby 阅读(421) 评论(0) 推荐(0)