Question

基于每个州，我需要获得与该州相关的总rxnumber。

我尝试了我的语法，但它没有选择与状态相关联的Max（RxNumber）。

with cte as
(
    select [State],
           RxNumber,
           ROW_NUMBER() OVER(PARTITION BY [State] 
                             ORDER BY [RxNumber]  Desc)  as [RowCount]
           from dbo.RxNumberState
)
select [State], MAX([RowCount]) as [TotalRx] 
from cte 
Group By [State],[RxNumber]

Answer 1

您需要从RXNUMBER子句中删除GROUP BY

试试这个......

with cte as
(
select      [State],
            RxNumber
             ,ROW_NUMBER() OVER(PARTITION BY [State] ORDER BY [RxNumber]  Desc)  as [RowCount]
            from
dbo.RxNumberState
)
select [State]
,MAX([RowCount]) as [TotalRx] 
, MAX(RXNUMBER) MAX_RXNUMBER
from cte 
Group By [State]

更好的方法是写下这个，应该解决你的目的

select [State]
, COUNT(RXNUMBER) as [TotalRx] 
, MAX(RXNUMBER) MAX_RXNUMBER
from dbo.RxNumberState
Group By [State]

如果同一RXNUMBER有多个条目，请使用COUNT(DISTINCT RXNUMBER)

Answer 2

未经测试但应该给你一些想法：

with cte as
(
    select distinct [State],
        rank() OVER(partition by [State] order by [State])  as [StateNumber]
    from dbo.RxNumberState
    group by [State]
)
select 
    r.[State],
    count(*) as [TotalRx] 
from dbo.rxNumberState r
join cte c on c.[State] = r.[State]
Group By r.[State]

关于Row_Number和CTE表表达式的SQL语法说明

2 个答案: