SQL/Oracle加入多個函數

Question

我有一個查詢，它給了我一個操作的結果。現在，我想要做的是在當前查詢這個結果分成2個部分，2個獨立的我所擁有的用戶羣...

Select Sum(Actions) From 
(
Select 
Count(Create_Dtime) As Actions 
From Player_Tapjoy 
Where 
Trunc(Create_Dtime) = To_Date('2012-sep-12','yyyy-mon-dd') 
Union All 
Select 
Count(Create_Dtime) As Actions 
From Player_aux_pt 
Where Site = 'AppCircle' And 
Trunc(Create_Dtime) = To_Date('2012-sep-12','yyyy-mon-dd') 
); 

兩個表具有player_id標籤。還有另一個名爲player_source的表，其中我有每個player_id的組ID（1-100）。我想通過player_id將當前查詢映射到player_source表，這樣我只能包含特定的group_id（比如1,2,3,4和6）。有什麼建議麼？

，我想在我的第一個查詢來從查詢到包括這些ID：

Select Player_Id From Player_Source S Inner Join Feature_Group_Xref F 
On S.Group_Id=F.Group_Id 
where f.feature_name = 'BC' 

Answer 1

既然你希望只包括特定的組ID，和player_source表有組ID，你需要加入player_source表到「主」表 - tapjoy和aux_pt。您必須在UNION的每個組件上執行此操作，因爲您正在彙總結果，並且無法在彙總後過濾單個記錄。您提供了查詢以獲取group_ids，因此內部聯接就是從tapjoy/aux_pt到feature_group_xref所需的全部內容。

這裏的結果：

Select Sum(Actions) From 
(
Select 
Count(t.Create_Dtime) As Actions 
From Player_Tapjoy t inner join player_source s on (t.player_id = s.player_id) 
Inner Join Feature_Group_Xref F On (S.Group_Id=F.Group_Id and f.feature_name = 'BC') 
Where Trunc(t.Create_Dtime) = To_Date('2012-sep-12','yyyy-mon-dd') 
Union All 
Select 
Count(a.Create_Dtime) As Actions 
From Player_aux_pt a inner join player_source s on (a.player_id = s.player_id) 
Inner Join Feature_Group_Xref F On (S.Group_Id=F.Group_Id and f.feature_name = 'BC') 
Where a.Site = 'AppCircle' And 
Trunc(a.Create_Dtime) = To_Date('2012-sep-12','yyyy-mon-dd') 
)