SQL ROW_NUMBER（）…在x和y之間中斷內連接

Question

我有這個內部連接語句，大多數情況下都可以使用，但是當我添加自定義分頁時，連接將返回一個空集。 任何建議將不勝感激。

這將返回我期望的結果

SELECT [Id]
,[Title]
FROM 
(SELECT [Id]
,[Title]
,ROW_NUMBER() OVER(ORDER BY id) as RowNum from Art) as e
INNER JOIN [ArtCat] p ON e.Id = p.ArtId 
WHERE 
p.CatId = @CategoryNum

這將返回一個空集

SELECT [Id]
,[Title]
FROM 
(SELECT [Id]
,[Title]
,ROW_NUMBER() OVER(ORDER BY id) as RowNum from Art) as e
INNER JOIN [ArtCat] p ON e.Id = p.ArtId 
WHERE 
p.CatId = @CategoryNum
AND  RowNum BETWEEN @startIndex AND (@startIndex + @pageSize) 

提前致謝！

Answer 1

格式化有點難讀，但是語法很好，為什么不檢查rownum的邊界呢？

SELECT MIN(RowNum),MAX(RowNum)          
FROM (SELECT [Id]
            ,[Title]
            ,ROW_NUMBER() OVER(ORDER BY id) as RowNum 
      FROM Art
      ) as e
INNER JOIN [ArtCat] p ON e.Id = p.ArtId 
WHERE p.CatId = @CategoryNum

奇怪的是，您應該在限制p.CatId = @CategoryNum之后使用RowNum

猜測這項工作：

SELECT [Id]
      ,[Title]
FROM (SELECT  [Id]
             ,[Title]
             ,ROW_NUMBER() OVER(ORDER BY id) as RowNum         
      FROM (SELECT [Id]
                  ,[Title]
            FROM Art
            ) as e
      INNER JOIN [ArtCat] p ON e.Id = p.ArtId 
      WHERE p.CatId = @CategoryNum
     )sub
WHERE RowNum BETWEEN @startIndex AND (@startIndex + @pageSize) 

Answer 2

山羊CO你真的有幫助！ 謝謝。 我們最終使用的代碼是。

SELECT
       ROW_NUMBER() OVER(ORDER BY id) as e.RowNum  
       ,e.[Id]
      ,e.[Title]

FROM (SELECT  
          [Id]
         ,[Title]
         ,ROW_NUMBER() OVER(ORDER BY id) as RowNum         
  FROM 
     (SELECT
           ROW_NUMBER() OVER(ORDER BY id) as RowNum
           ,[Id]
           ,[Title]

           FROM Art
              INNER JOIN [ArtCat] p ON e.Id = p.ArtId 

       WHERE p.CatId = @CategoryNum
     ) as e
WHERE 
  e.RowNum BETWEEN @startIndex AND (@startIndex + @pageSize) 

要對結果進行預過濾（如您所用），但要在外部表上再排一行以真正組織結果。

我的同事也抱怨我的格式太..哈