热线电话:13121318867

登录
2022-09-09 阅读量: 725
SQL德邦面试题

image.png

如图所示,按照要求用SQL查询:

select * from 揽收表;

select 单量,count(*) as 客户数

from

(select

客户id,

count(distinct 运单号) as 下单次数,

case when count(distinct 运单号)<=5 then '0-5'

when count(distinct 运单号)<=10 then '6-10'

when count(distinct 运单号)<=20 then '11-20'

else '20以上'

end as 单量

from 揽收表

where month(创建日期)=5

group by 客户id) as t

group by 单量;

#先按照给定的区间,将去重的运单号划分到其中,之后再对区间分组求和,用case when 逻辑更清晰,用if判断也可


23.5688
0
关注作者
收藏
评论(0)

发表评论

暂无数据
推荐帖子