在同一個查詢結果集中使用不同where子句的多重總和

我有幾個表，我將它們連接在一起並從中選擇各種列和總和，並且我想結合select語句以便所有結果都在相同的結果集中。我現在有喜歡的查詢：在同一個查詢結果集中使用不同where子句的多重總和

declare @year INT 
declare @month INT 
set @year = '2013' 
set @month = '08' 

select CAST(LEFT(b.name, 3) AS varchar(3))AS Region, a.model, sum(a.Number)AS Uniques 
from Table1 a 
inner join database2.....table2 b 
on a.code = b.code 
where Year(a.EventDate) = @year 
and Month(a.EventDate) = @month 
and a.make='Toyota' 
group by CAST(LEFT(b.name, 3) AS varchar(3)), a.model 
order by CAST(LEFT(b.name, 3) AS varchar(3))

這帶來了一個數據集，看起來是這樣的：

Region Model Uniques 
EST  Toyota  200 
EST  Honda  350 
CEN  Toyota  220 
CEN  VW   150

然後我有另一個類似的查詢，但使用不同的表和要求：

select CAST(LEFT(c.name, 3) AS varchar(3)) AS Region, a.Model, sum(b.Number)As Sales 
from Table1 a 
left join Table3 b 
on a.leadid = b.leadid 
inner join Database1..Table2 c 
on a.code = c.code 
where Year(a.EventDate) = @year 
and Month(a.EventDate) = @month 
and a.make='Toyota' 
group by a.Model, CAST(LEFT(c.Name, 3) AS varchar(3)) 
order by CAST(LEFT(c.Name, 3) AS varchar(3))

這帶來了類似的結果集：

Region  Model  Sales 
    EST  Toyota  150 
    CEN  VW   80 
    CEN  Toyota  75

我只想配對這些結果或進行連接查詢，這樣我就可以得到類似的結果;

Region Model  Uniques Sales 
EST  Toyota  200   150 
EST  Honda  350   0 
CEN  Toyota  220   75 
CEN  vW   150   80

總共有20-30個地區/模型的組合，它們對於每個結果集都是相同的。

來源

2013-12-11 Luke K.

好吧，如果你不能做到這一切在一個查詢中，那麼你可以簡單地加入2個查詢一起：

select 
t1.region, 
t1.model, 
t1.uniques, 
t2.sales 
from 
(select CAST(LEFT(b.name, 3) AS varchar(3))AS Region, a.model, sum(a.Number)AS Uniques 
from Table1 a 
inner join database2.....table2 b 
on a.code = b.code 
where Year(a.EventDate) = @year 
and Month(a.EventDate) = @month 
and a.make='Toyota' 
group by CAST(LEFT(b.name, 3) AS varchar(3)), a.model 
order by CAST(LEFT(b.name, 3) AS varchar(3)) 
) t1 
inner join 
(
select CAST(LEFT(c.name, 3) AS varchar(3)) AS Region, a.Model, sum(b.Number)As Sales 
from Table1 a 
left join Table3 b 
on a.leadid = b.leadid 
inner join Database1..Table2 c 
on a.code = c.code 
where Year(a.EventDate) = @year 
and Month(a.EventDate) = @month 
and a.make='Toyota' 
group by a.Model, CAST(LEFT(c.Name, 3) AS varchar(3)) 
order by CAST(LEFT(c.Name, 3) AS varchar(3)) 
) t2 
on t1.region = t2.region 
and t1.model = t2.model

來源

2013-12-11 21:53:27 Andrew

感謝這個答案完美的作品。我這樣做，然後從原始查詢中取出ORDER BY並獲得了我的結果集。 –

+1，但它可能需要'FULL JOIN'和NULL處理來獲得來自兩個子查詢的所有結果 – GarethD

是的，我只是做了LEFT OUTER JOIN而不是內部連接，然後在我的select語句中是：SELECT t1.region，t1。模型，t1.uniques，isnull（t2.sales，0）AS銷售 –

使用這一概念：

SUM (CASE WHEN ConditionIsMet THEN Column1 ELSE 0 END), 
SUM (CASE WHEN OtherCondIsMet THEN Column2 ELSE 0 END)

來源

2013-12-11 22:06:38

在同一個查詢結果集中使用不同where子句的多重總和

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