用于分页的公用表中的 T-SQL 动态排序依据

Question

我找到了一些用于动态排序和顺序的很棒的 sql 代码，但我想知道是否有人可以帮我重新调整它，以便下面的 PROC 中的 CTE 使用动态排序/顺序。此代码运行 - 但输出不是我所追求的，因为 ORDER BY p.ProductId 首先发生在 CTE 中，然后 ORDER BY CASE 语句仅适用于记录 6 到 10

DECLARE @Skip int
DECLARE @Take int
DECLARE @OrderBy VARCHAR(50)

SET @Skip = 5;
SET @Take = 5;
SET @OrderBy = 'PriceAsc';


WITH ProductCT AS
(
    SELECT ROW_NUMBER() OVER(ORDER BY p.ProductId) AS RowNum
    , p.ProductId
    FROM dbo.Product AS p
)
SELECT   p.ProductId
        ,p.Title
        ,p.Price
FROM dbo.Product AS p
INNER JOIN ProductCT AS pct ON pct.ProductId = p.ProductId
WHERE pct.RowNum BETWEEN @Skip + 1 AND (@Skip + @Take)
ORDER BY
    CASE     
         WHEN @OrderBy = 'TitleAsc' THEN (RANK() OVER (ORDER BY p.Title))
         WHEN @OrderBy = 'TitleDesc' THEN (RANK() OVER (ORDER BY p.Title DESC))
         WHEN @OrderBy = 'PriceAsc' THEN (RANK() OVER (ORDER BY p.Price))
         WHEN @OrderBy = 'PriceDesc' THEN (RANK() OVER (ORDER BY p.Price DESC))
         ELSE (RANK() OVER (ORDER BY p.Price))
    END

提前感谢您的任何建议:-)

Answer 1

我最初将@Johan 的答案标记为正确，因为它有效，但我有点不确定 INNER JOIN 以及此查询的整体复杂性。

我和我的一位同事聊了聊这个问题，他想出了这个非常整洁的解决方案（感谢汤姆！！）所以我想我会分享它：

DECLARE @Skip int
DECLARE @Take int
DECLARE @OrderBy VARCHAR(50)

SET @Skip = 5;
SET @Take = 5;
SET @OrderBy = 'PriceAsc';


WITH ProductCT AS
(
    SELECT
    CASE
       WHEN @OrderBy = 'TitleAsc' THEN ROW_NUMBER() OVER (ORDER BY p.Title)
       WHEN @OrderBy = 'TitleDesc' THEN ROW_NUMBER() OVER (ORDER BY p.Title DESC)
       WHEN @OrderBy = 'PriceAsc' THEN ROW_NUMBER() OVER (ORDER BY p.Price)
       WHEN @OrderBy = 'PriceDesc' THEN ROW_NUMBER() OVER (ORDER BY p.Price DESC)
    END AS RowNum
    , p.ProductId
    FROM dbo.Product AS p
)
SELECT   p.ProductId
        ,p.Title
        ,p.Price
FROM dbo.Product AS p
INNER JOIN ProductCT AS pct ON pct.ProductId = p.ProductId
WHERE pct.RowNum BETWEEN @Skip + 1 AND (@Skip + @Take)
ORDER BY RowNum

Answer 2

这是一个应该可行的解决方案。

WITH ProductCT AS
(
    SELECT  ROW_NUMBER() OVER(ORDER BY p.Title) AS RowNum1
            ,ROW_NUMBER() OVER(ORDER BY p.Title DESC) AS RowNum2
            ,ROW_NUMBER() OVER(ORDER BY p.Price) AS RowNum3
            ,ROW_NUMBER() OVER(ORDER BY p.Price DESC) AS RowNum4
            ,p.ProductId
    FROM dbo.Product AS p
)
SELECT   p.ProductId
        ,p.Title
        ,p.Price
FROM dbo.Product AS p
INNER JOIN ProductCT AS pct 
    ON  pct.ProductId = p.ProductId
    AND ((@OrderBy = 'TitleAsc' AND pct.RowNum1 BETWEEN @Skip + 1 AND (@Skip + @Take))
    OR  (@OrderBy = 'TitleDesc' AND pct.RowNum2 BETWEEN @Skip + 1 AND (@Skip + @Take))
    OR  (@OrderBy = 'PriceAsc' AND pct.RowNum3 BETWEEN @Skip + 1 AND (@Skip + @Take))
    OR  (@OrderBy = 'PriceDesc' AND pct.RowNum4 BETWEEN @Skip + 1 AND (@Skip + @Take))
    )
ORDER BY
    CASE @OrderBy
         WHEN 'TitleAsc' THEN RowNum1
         WHEN 'TitleDesc' THEN RowNum2
         WHEN 'PriceAsc' THEN RowNum3
         WHEN 'PriceDesc' THEN RowNum4
         ELSE RowNum3
    END

我认为JOIN 可以写得更好，但我现在没有更多时间。

Answer 3

Rob 的解决方案不知何故对我不起作用，这是我修改后的版本，效果很好。

       SELECT
          ROW_NUMBER() OVER (ORDER BY 
    CASE
       WHEN @sortOrder = 'TitleAsc' THEN p.Title
       WHEN @sortOrder = 'TitleDesc' THEN  p.Title
       WHEN @sortOrder = 'PatientId' THEN  p.Title
       WHEN @sortOrder = 'PriceAsc' THEN  p.Title
       WHEN @sortOrder = 'PriceDesc' THEN  p.Title
    END ASC) AS [RowNum],
       .................
      ..................