SQL去重求和的问题
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解决时间 2021-03-23 10:47
- 提问者网友：爱唱彩虹
- 2021-03-22 21:50
SQL去重求和的问题
最佳答案
- 五星知识达人网友：迷人又混蛋
- 2021-03-22 22:27
--这个事去重后的结果
select * from test where id in(select id from(select name,MIN(id) id from test group by name)a)
--这个是去重后的num求和
select sum(num) from test where id in(select id from(select name,MIN(id) id from test group by name)a)追问这只是个demo,实际用的时候IN的效率受不了追答--那试试这个
select id,name,num from (select *, row_number() over (partition by name order by name ) xh from #test) a where a.xh=1
select * from test where id in(select id from(select name,MIN(id) id from test group by name)a)
--这个是去重后的num求和
select sum(num) from test where id in(select id from(select name,MIN(id) id from test group by name)a)追问这只是个demo,实际用的时候IN的效率受不了追答--那试试这个
select id,name,num from (select *, row_number() over (partition by name order by name ) xh from #test) a where a.xh=1
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