SQL SELECT語句動態多conditon

Question

我有3個表，說images(id), news(id), types(id, category, obj_id, type)

例如，新聞類是黑色，紅色。

數據結構是一樣

{ 
    types(xxxx1,red,news_A,news) 
    types(xxxx2,black,news_A,news) 
} 

現在我需要找出型紅色和黑色的所有圖像。

在這種情況下，我需要images_B

{ 
    types(oooo1,red,images_B,images) 
    types(oooo2,black,images_B,images) 
    types(oooo3,red,images_C,images) 
    types(oooo4,red,images_D,images) 
    types(oooo5,black,images_E,images) 
} 

很顯然，我不能寫

select obj_id from types 
where category in (select category from types where obj_id = news_A) 
and type = images. 

因爲，這樣，它會返回images_B，C，d，E。我只需要images_B。

類別也是動態的。這可能是紅色，藍色，粉紅色......

Answer 1

一種方法

SELECT * INTO #types 
FROM 
(SELECT 'xxxx1' AS id,'red' AS category,'news_A' AS obj_id,'news' AS [type] UNION ALL 
SELECT 'xxxx2' AS id,'black' AS category,'news_A' AS obj_id,'news' AS [type] UNION ALL 
SELECT 'oooo1' AS id,'red' AS category,'images_B' AS obj_id,'images' AS [type] UNION ALL 
SELECT 'oooo2' AS id,'black' AS category,'images_B' AS obj_id,'images' AS [type] UNION ALL 
SELECT 'oooo3' AS id,'red' AS category,'images_C' AS obj_id,'images' AS [type] UNION ALL 
SELECT 'oooo4' AS id,'red' AS category,'images_D' AS obj_id,'images' AS [type] UNION ALL 
SELECT 'oooo5' AS id,'black' AS category,'images_E' AS obj_id,'images' AS [type]) X 

declare @target varchar(10) 
set @target = 'news_A' 

;with ConcatTypes As 
(
SELECT obj_id, 
    (
     select distinct '' + t.[category] as cat 
     from #types t 
     where t.obj_id = t1.obj_id 
     order by cat 
     for xml path('') 
    ) as catlist 
FROM #types t1 
GROUP BY obj_id 
) 
SELECT obj_id, catlist 
FROM ConcatTypes 
WHERE obj_id<> @target and catlist = 
      (select catlist FROM ConcatTypes where obj_id=@target)