MySql的一道小练习

记录点点滴滴，MySql小练习一题，发现都快忘记了，回头要温习下数据库了

表：

得到结果：

SQL语句：

select a.name,a.胜,b.负 from 

(select name,count(balance) as '胜' from account where balance = '胜' group by name) a 

left join (select name,count(balance) as '负' from account where balance = '负' group by name) b 

on a.name = b.name 

where a.name = b.name;