T-SQL計數，並得到字段和從具有相同的GUID相關

Question

編輯另一個表： 嘿大家，

我想通了

select LI.ProjectId, count(*) as numLineItems 
into #temp 
from dbo.SQLLineItems as LI 
group by LI.ProjectId 
having COUNT(*) < =200 

select numLineItems, count(*), SUM(PT.GrandTotalSell) from 
#temp 
inner join dbo.SQLProjectTotals as PT 
on PT.ProjectId = #temp.ProjectId 
group by numLineItems; 

謝謝您的幫助。

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我有兩個包含項目信息的表。表1包含LineItem，每個LineItem都具有對該表唯一的GUID和對於ProjectID的GUID。每個ProjectID都有重複項，因爲一個ProjectID可以有多個LineItem。

表2通過項目ID鏈接到表1，GUID在該表中是唯一的。表2還包含每個項目的價格。

我想通過LineItems的數量來分解項目，看看有多少個項目是1,2,3,4 ...項目項目。

我寫了一個可行的查詢：

use FieldedProjects; 

select LI.ProjectId, count(*) as numLineItems 
into #temp 
from dbo.SQLLineItems as LI 
group by LI.ProjectId 
having COUNT(*) < =15 

select numLineItems, count(*) from 
#temp 
group by numLineItems; 

，但現在我想修改它顯示的價格總和。因此，項目總價格爲1項項目爲100，2項工程爲300，...

我想這樣

use FieldedProjects; 

select LI.ProjectId, count(*) as numLineItems, SUM(PT.GrandTotalSell) as projectTotal 
into #temp 
from dbo.SQLLineItems as LI 
inner join dbo.SQLProjectTotals as PT 
on LI.ProjectID = PT.ProjectID 
group by LI.ProjectId 
having COUNT(*) < =15 

select numLineItems, count(*), projectTotal from 
#temp 
group by numLineItems; 

但由於projectTotal未在包含它給了我一個錯誤集合函數。難道應該是

select numLineItems, count(*), SUM(projectTotal) from 

Answer 1

select * 
from dbo.SQLProjectTotals as PT 
cross apply 
(
    select count(*) 
    from dbo.SQLLineItems LI 
    where LI.ProjectID = PT.ProjectID 
) items(Count) 
where items.Count <= 15