一道SQL面试题——表行列数据转换(表转置)

SQL语句如下：

select
country, 
sum(case when type='A' then money end) as A,
sum(case when type='B' then money end) as B,
sum(case when type='C' then money end) as C
from table1
group by country

本文转自：https://blog.csdn.net/Eastmount/article/details/50559008