總結多表格親子關係第2部分的公共列

Question

這是Summing common columns of multi table parent-child relation的直接後續。

表格佈局是：

CREATE TABLE [dbo].[a] 

[primary_key] [nvarchar](7) NOT NULL 

CREATE TABLE [dbo].[b] 

[column1] [nvarchar](7) NOT NULL 
[column2] [int] NOT NULL 
[column3] [int] not null 

CREATE TABLE [dbo].[c] 

[column1] [nvarchar](7) NOT NULL 
[column2] [int] NOT NULL 
[column3] [int] not null 

CREATE TABLE [dbo].[d] 

[column1] [nvarchar](7) NOT NULL 
[column2] [int] NOT NULL 
[column3] [int] not null 

CREATE TABLE [dbo].[DateTable] 

[index] [int] NOT NULL 
[date] [date] NOT NULL 

這是大致的設計。我有1對父母和3個孩子中，我用這個sql查詢總結了3行

SELECT a.primary_key, 
b.Sum AS Expr1, 
c.Sum AS Expr2, 
d.Sum AS Expr3, 
ISNULL(b.Sum, 0) + ISNULL(c.Sum, 0) + ISNULL(d.Sum, 0) as [GrandTotal] 
FROM dbo.Agency_Table a 
OUTER APPLY (SELECT SUM(ISNULL(b.column2, 0)) [Sum] FROM dbo.b WHERE a.primary_key = b.column1) as b 
OUTER APPLY (SELECT SUM(ISNULL(c.column2, 0)) [Sum] FROM dbo.c WHERE a.primary_key = c.column1) as c 
OUTER APPLY (SELECT SUM(ISNULL(d.column2, 0)) [Sum] FROM dbo.d WHERE a.primary_key = d.column1 as d 

現在我要實現的是用b，c和d的3列是一個int上次查詢連接到日期表（E）的字段。我想按日期分組。這可以通過在int上進行分組來完成，但最好由實際日期進行分組。所以有效地將數據庫想象成與父母無關的父母表，然後是其3個孩子。

我設想是這樣的

SELECT a.primary_key, 
b.Sum AS Expr1, 
c.Sum AS Expr2, 
d.Sum AS Expr3, 
dbo.dateTable.Date 
ISNULL(b.Sum, 0) + ISNULL(c.Sum, 0) + ISNULL(d.Sum, 0) as [GrandTotal] 
FROM dbo.Agency_Table a 
OUTER APPLY (SELECT SUM(ISNULL(b.column2, 0)) [Sum] FROM dbo.b WHERE a.primary_key = b.column1) as b 
OUTER APPLY (SELECT SUM(ISNULL(c.column2, 0)) [Sum] FROM dbo.c WHERE a.primary_key = c.column1) as c 
OUTER APPLY (SELECT SUM(ISNULL(d.column2, 0)) [Sum] FROM dbo.d WHERE a.primary_key = d.column1 as d 

//some kind of join to the next table 
INNER JOIN dbo.b ON dbo.Date.index = dbo.b.Column3 
INNER JOIN dbo.c ON dbo.Date.index = dbo.c.column3 
INNER JOIN dbo.d ON dbo.Date.index = dbo.d.column3 


group by dbo.dateTable.Date? 

對不起事先我覺得像即時得到你做我的工作。

這是SQL Server 2012

Answer 1

您可以結合b，c和d與UNION運算符，加入在列識別所述源表：

SELECT column1, column2, column3, 1 AS Src FROM dbo.b 
UNION ALL 
SELECT column1, column2, column3, 2 AS Src FROM dbo.c 
UNION ALL 
SELECT column1, column2, column3, 3 AS Src FROM dbo.d 

...加入合併後設定爲Date的相關子集：

(
    SELECT column1, column2, column3, 1 AS Src FROM dbo.b 
    UNION ALL 
    SELECT column1, column2, column3, 2 AS Src FROM dbo.c 
    UNION ALL 
    SELECT column1, column2, column3, 3 AS Src FROM dbo.d 
) AS s 
INNER JOIN 
    dbo.Dates AS d ON s.column3 = d.DateRef AND d.DateValue = ... 

...然後外加入結果a：

(
    SELECT column1, column2, column3, 1 AS Src FROM dbo.b 
    UNION ALL 
    SELECT column1, column2, column3, 2 AS Src FROM dbo.c 
    UNION ALL 
    SELECT column1, column2, column3, 3 AS Src FROM dbo.d 
) AS s 
INNER JOIN 
    dbo.Dates AS d ON s.column3 = d.DateRef AND d.DateValue = ... 
RIGHT JOIN 
    dbo.a AS a ON s.column1 = a.primary_key 

現在，您可以通過a.primary_key組，以獲得獨立的彙總結果爲每個子表，你可以使用CASE進行條件聚合：

SELECT 
    a.primary_key, 
    Expr1  = SUM(CASE s.Src WHEN 1 THEN s.column2), 
    Expr2  = SUM(CASE s.Src WHEN 2 THEN s.column2), 
    Expr3  = SUM(CASE s.Src WHEN 3 THEN s.column2), 
    GrandTotal = SUM(s.column2) 
FROM 
    (
    SELECT column1, column2, column3, 1 AS Src FROM dbo.b 
    UNION ALL 
    SELECT column1, column2, column3, 2 AS Src FROM dbo.c 
    UNION ALL 
    SELECT column1, column2, column3, 3 AS Src FROM dbo.d 
) AS s 
INNER JOIN 
    dbo.Dates AS d ON s.column3 = d.DateRef AND d.DateValue = ... 
RIGHT JOIN 
    dbo.a AS a ON s.column1 = a.primary_key 
GROUP BY 
    a.primary_key 
; 

Answer 2

我發現，通過改變where子句包括日期過濾它確實讓我組的靈活性含水位他們