【MySql】聚合函数+if 实现透视功能

一、原表

二、语句

select type,
sum(if(date='2019-10-1',num,null)) as '20191001',
sum(if(date='2019-10-2',num,null)) as '20191002',
sum(if(date='2019-10-3',num,null)) as '20191003'
from del 
group by type;

三、结果