分页的SQL查询具有过滤器

Question

我正在使用T-SQL这样的分页

SELECT @PageSize = 4,
@Page = 1;
SELECT T.* FROM (((SELECT RANK() OVER(PARTITION BY 'T' ORDER BY ID) AS 
RowIndex, * FROM VideoGallery) AS T
INNER JOIN Video_Category ON T.ID = Video_Category.VideoID)
INNER JOIN VCategories ON VCategories.Name = N'catname' AND 
Video_Category.CategoryID = VCategories.ID)
WHERE T.RowIndex BETWEEN ((@Page - 1) * @PageSize + 1) AND (@Page * 
@PageSize);

结果就像：

ROWINDEX     NAME
   1        backup
   2        email   
   3        fax
   4        GSM
   5        backup
   6        email   
   13       fax
   18       GSM

问题：在第2页中仅显示2个结果 我想在第2页上显示ROWINDEX 13和18

Answer 1

尝试这种方式

按******订购

OFFSET @ItemsPerPage *（@CurrentPage-1）行

仅次于@ItemsPerPage ROWS

DECLARE @Page int = 1;
DECLARE @PageSize int = 4;

SELECT T.* FROM (((SELECT RANK() OVER(PARTITION BY 'T' ORDER BY ID) AS 
RowIndex, * FROM VideoGallery) AS T
INNER JOIN Video_Category ON T.ID = Video_Category.VideoID)
INNER JOIN VCategories ON VCategories.Name = N'catname' AND 
Video_Category.CategoryID = VCategories.ID)

ORDER BY T.ID
OFFSET @PageSize * (@Page - 1) ROWS
FETCH NEXT @PageSize ROWS ONLY

Answer 2

该查询失败，因为您的join过滤出了一些行号，因此它们不是连续的，并且之间可能会有间隔。

我用适当的缩进重写了您的查询，并删除了不必要的查询嵌套。试试看：

SELECT @PageSize = 4, @Page = 1;
SELECT * 
FROM (
  SELECT vg.*,
         RANK() OVER(/*PARTITION BY 'T' */ORDER BY vc.VideoID) AS RowIndex
  FROM VideoGallery AS vg
  INNER JOIN Video_Category vc ON vg.ID = vc.VideoID
  INNER JOIN VCategories vc2 ON vc2.[Name] = N'catname' AND vc.CategoryID = vc2.ID
) a
WHERE RowIndex BETWEEN ((@Page - 1) * @PageSize + 1) AND (@Page * @PageSize);

此外，如果您确实愿意，我在RANK() OVER(/*PARTITION BY 'T' */ORDER BY ID)处注释了一部分代码，请取消注释。

Answer 3

@MorteZa SenFi;看看这个模拟。我认为问题可能出在您对RowIndex的定义上（您应该使用ROW_NUMBER而不是RANK。请检查RowIndex列实际上是连续的还是连续的。

请参见下面的一个简单示例：

DECLARE @PageSize INT = 3
DECLARE @Page INT = 2;


DECLARE @tblVideoGallery TABLE (Id INT, Name VARCHAR(20))
INSERT INTO @tblVideoGallery
SELECT 1,'backup' UNION ALL
SELECT 2, 'email' UNION ALL   
SELECT 3, 'fax' UNION ALL 
SELECT 4, 'GSM' UNION ALL 
SELECT 5, 'backup' UNION ALL 
SELECT 6, 'email'  UNION ALL   
SELECT 7, 'fax' UNION ALL 
SELECT 8, 'GSM'






SELECT T.* 
FROM (
SELECT  ROW_NUMBER() OVER(ORDER BY ID) AS RowIndex, *
FROM @tblVideoGallery

) T
--INNER JOIN Video_Category ON T.ID = Video_Category.VideoID)
--INNER JOIN VCategories ON VCategories.Name = N'catname' AND 
--Video_Category.CategoryID = VCategories.ID)
WHERE T.RowIndex BETWEEN ((@Page - 1) * @PageSize + 1) AND (@Page * 
@PageSize);

查看结果：