如图两张ORACLE数据表我要如何让表1中数据列除以表2中的总数据

答案:1 悬赏:30 手机版

解决时间 2021-11-11 07:32

提问者网友：心如荒岛囚我终老
2021-11-10 19:12

最佳答案

五星知识达人网友：毛毛
2021-11-10 19:38

select a.brand_id,a.brand_name,(a.cnt1/b.cnt2)*100||'%' percentage from (select g.brand_id, c.brand_name, count(g.brand_id) cnt1 from car_goods_info g left join car_brand c on g.brand_id=c.id group by g.brand_id,c.brand_name ) a left join
(select count(*) cnt2 from car_goods_info) b on 1=1 试试追问我去真厉害！！那个小数位数能不能限制在2位之内啊，还有就是。。前面的0咋没了- -！

追答select a.brand_id,a.brand_name,round((a.cnt1/b.cnt2)*100,2)||'%' percentage from (select g.brand_id, c.brand_name, count(g.brand_id) cnt1 from car_goods_info g left join car_brand c on g.brand_id=c.id group by g.brand_id,c.brand_name ) a left join
(select count(*) cnt2 from car_goods_info) b on 1=1

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