我有以下表格
表名:REC
Name | Hits | Month | State
Joe | 15 | 1 | CA
Joe | 16 | 2 | CA
Joe | 12 | 3 | TX
我想得到的是一行中的结果,其中包含姓名,所有点击数的总和,以及最新状态。
所以我的结果应该是:
Name | SumHits | RecentState
Joe | 43 | TX
这是我到目前为止所拥有的:
此查询获取命中的名称和总和:
select Name, sum(Hits)
from REC
Group By Name
这个查询让我接近我想要的东西,但它只返回我最近一个月(12)中的点击而不是我想要的(43)
select a.Name, a.Hits, b.Month, a.State
from REC as a
Inner Join (
select Name, max(Month) as Month
from REC
Group By Name) as b
On a.Name = b.Name
And a.Month = b.Month
答案 0 :(得分:1)
您可以在子查询中包含总和,如下所示:
select a.Name, b.Total_Hits, b.Month, a.State
from REC as a
Inner Join (
select Name, max(Month) as Month, sum(Hits) as Total_Hits
from REC
Group By Name) as b
On a.Name = b.Name
And a.Month = b.Month