每个记录乘数一条记录

Question

[Links]
LinkID, Link  
1,http:/link1  
2,http:/link2  

[Link2Page]  
LinkID, PageID

1,1  
1,2  
1,3  
2,3   
2,4  
2,5  

[Pages] PageID, Title, Url , EndPage(bit)

1, title page 1 , http:/page1 , false  
2, title page 2 , http:/page2 , true  
3, title page 3 , http:/page3 , false  
4, title page 4 , http:/page4 , false  
5, title page 5 , http:/page5 , true  

我想按 endPage desc 列出所有页面的链接和 1 条记录

例如

LinkId , Link , PageID , Title , Url  
1 , http:/link1 , 2 , title page 2 , http:/page2  
2 , http:/link2 , 5 , title page 5 , http:/page5  
...

我为Link2Page中存在的每条记录选择的页面就像

( Select TOP 1 PageID,Title,Url from Pages Order By EndPage Desc )

离我最近的是：

Select LinkID , Link , ( Select TOP 1 PageID From Pages Where PageID IN ( Select PageID From Link2Page Where Link2Page.LinkID = Links.LinkID ) ) as PageID From Links;

但我错过了其余的列（ Pages.Title ， Pages.Url ）等

蹩脚的尝试（？）：

选择 LinkID , Link ,

(Select TOP 1 PageID From Pages Where PageID IN (Select PageID From Link2Page Where Link2Page.LinkID = Links.LinkID)) 作为PageID，

(Select TOP 1 URL From Pages Where PageID IN (Select PageID From Link2Page Where Link2Page.LinkID = Links.LinkID)) 作为 URL，

(Select TOP 1 Title From Pages Where PageID IN (Select PageID From Link2Page Where Link2Page.LinkID = Links.LinkID)) 作为标题

来自链接；`

Answer 1

SELECT *
FROM Links l
CROSS APPLY (
  SELECT TOP 1 p.*
  FROM Pages p
  INNER JOIN Link2Page x ON (x.PageID = p.PageID)
  WHERE x.LinkID = l.LinkID
  ORDER BY EndPage DESC
) p