1

目前它正在工作，但我希望 xml 包含没有限制的总行数。

SET @query_result = (SELECT ID,Title 
        FROM
        ( 
            SELECT items.id AS "ID",items.title AS "Title" ,
ROW_NUMBER() OVER(ORDER BY date_added DESC) AS RowNum
                FROM [cars] 
                JOIN [items] ON items.id=cars.item_id
                WHERE
                rejected = 0 


    )AS MyDerivedTable
        WHERE
        MyDerivedTable.RowNum BETWEEN (@page-1)*2+1 AND (@page*2) 
        FOR XML PATH('car'),ROOT('items')
)

这返回

<items>
  <car>
    <ID>37</ID>
    <Title>Used 2004 Chevrolet Corvette Convertible</Title>
  </car>
</items>

我想

<items>
      <car>
        <ID>37</ID>
        <Title>Used 2004 Chevrolet Corvette Convertible</Title>
        <Count>6</Count>
      </car>
    </items>

虽然 Count 不是返回的行数，而是与查询匹配的总行数。或者，如果我的问题对任何人来说都难以理解，我正在寻找 FOUND_ROWS() 的 MSSQL 替代方案；这个问题@ SQL Count total number of rows while using LIMIT试图回答同样的问题，但我想要一个解决方案是 MSSQL。

4

1 回答 1

2

好的，我希望我现在明白你想要做什么。我相信您必须“扭转”您的选择并使用 CTE（通用表表达式）而不是子选择来实现这一点。

试试这个：

DECLARE @queryResult VARCHAR(MAX)

;WITH MyDerivedTable AS
(
    SELECT 
       items.id,
       items.title,
       ROW_NUMBER() OVER(ORDER BY date_added DESC) AS RowNum
    FROM dbo.cars
    INNER JOIN dbo.items ON items.id = cars.item_id
    WHERE rejected = 0 
) 
SELECT
   @queryResult = 
   (SELECT
       ID, Title,
       (SELECT MAX(RowNum) FROM MyDerivedTable) AS 'Count'
    FROM
       MyDerivedTable
    WHERE
        RowNum BETWEEN (@page-1)*2+1 AND (@page*2) 
    FOR XML PATH('car'),ROOT('items')
   )

SELECT @queryResult

That should output your ID, Title and the Count (which is the max of the RowNum) for each car entry.

于 2011-04-16T12:23:34.833 回答