【MySql】聚合函數+if 實現透視功能

一、原表

二、語句

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、結果