Question

我遇到了一个基本的存储过程，不幸的是我不是一个SQL专家，我想要做的是按2个参数@OrderBy和@SortOrder排序提供结果，但是结果仅根据子查询的结果进行排序。例如：

exec [dbo].[GetTest2] @Page=0,@Limit=150,@OrderBy=N'NetworkName',@SortOrder=N'asc'

它按预期工作，但

exec [dbo].[GetTest2] @Page=0,@Limit=15,@OrderBy=N'NetworkName',@SortOrder=N'asc'

不起作用，因为子查询不返回所有记录。

如何对整个记录集进行排序？

USE [MyContext]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
alter PROCEDURE [dbo].[GetTest2] 
    @Page int = 0,
    @Limit int = 10,
    @OrderBy nvarchar(50) = 'OfferId',
    @Name nvarchar(100) = NULL,
    @SortOrder nvarchar(50) = 'asc'
AS
BEGIN
    SET NOCOUNT ON;
    SELECT * FROM (SELECT ROW_NUMBER() OVER(ORDER BY @OrderBy) AS ROWNUMBER, 
                  COUNT(*) OVER() AS [Total_Rows], 
                  a.Name AS NetworkName, 
                  o.*  

                  FROM offers AS o 
                    left outer join AffiliateNetworks AS a ON o.NetworkId = a.Id

                  WHERE (@Name IS NULL OR o.Name LIKE '%' + @Name + '%' )) AS Paged 
    WHERE 

    Paged.ROWNUMBER > @Limit * @Page AND 
    Paged.ROWNUMBER <= (@Limit * @Page) + @Limit

    order by 
                    case 
                        when @SortOrder <> 'asc' then NULL
                        when @OrderBy = 'Name' then Name
                        end ASC,
                    case 
                        when @SortOrder <> 'asc' then NULL
                        when @OrderBy = 'NetworkName' then NetworkName
                        end ASC,
                    case 
                        when @SortOrder <> 'desc' then NULL
                        when @OrderBy = 'Name' then Name
                        end DESC,
                    case 
                        when @SortOrder <> 'desc' then NULL
                        when @OrderBy = 'NetworkName' then NetworkName
                        end DESC

END

Answer 1

您可以考虑在ROW_NUMBER中添加排序以保持分页一致。我将子查询包装在CTE中，使其更容易阅读。

ALTER PROCEDURE [dbo].[GetTest2] 
    @Page int = 0,
    @Limit int = 10,
    @OrderBy nvarchar(50) = 'OfferId',
    @Name nvarchar(100) = NULL,
    @SortOrder nvarchar(50) = 'asc'
AS
BEGIN
    SET NOCOUNT ON;

    ;WITH Paged AS (
        SELECT ROW_NUMBER() OVER (
            ORDER BY
                CASE WHEN @SortOrder = 'ASC'
                    THEN (CASE @OrderBy WHEN = 'Name' THEN Name WHEN 'NetworkName' THEN a.Name END) END ASC,
                CASE WHEN @SortOrder = 'DESC'
                    THEN (CASE @OrderBy WHEN = 'Name' THEN Name WHEN 'NetworkName' THEN a.Name END) END DESC)
            ) AS ROWNUMBER,
            COUNT(*) OVER() AS [Total_Rows],
            a.Name AS NetworkName,
            o.*
        FROM offers AS o 
            left outer join AffiliateNetworks AS a ON o.NetworkId = a.Id
        WHERE (@Name IS NULL OR o.Name LIKE '%' + @Name + '%' )
    )
        SELECT *
        FROM Paged
        WHERE ROWNUMBER - (@Limit * @Page) BETWEEN 1 AND @Limit
        ORDER BY ROWNUMBER
END
GO

正如评论中所提到的，ROW_NUMBER可能不是SQL Server更高版本中分页的最佳构造。如果您使用的是至少2012或更高版本，则可以使用OFFSET和FETCH NEXT进行分页。然后你的查询变成这样：

    SELECT
        COUNT(*) OVER() AS [Total_Rows],
        CASE @OrderBy WHEN = 'Name' THEN o.Name WHEN 'NetworkName' THEN a.Name END AS SortName,
        a.Name AS NetworkName,
        o.*
    FROM offers AS o 
        left outer join AffiliateNetworks AS a ON o.NetworkId = a.Id
    WHERE (@Name IS NULL OR o.Name LIKE '%' + @Name + '%' )
    ORDER BY
        CASE WHEN @SortOrder = 'ASC' THEN SortName ELSE NULL END ASC,
        CASE WHEN @SortOrder = 'DESC' THEN SortName ELSE NULL END DESC
    OFFSET (@Page * @Limit) ROWS
    FETCH NEXT @Limit ROWS ONLY;

Answer 2

试试这个：

select d.*
from Distributor d, DistributorProducts dp, Product p
where dp.DistributorId = d.id
and p.Id = dp.ProductId
and (p.product = 'Apple' AND p.product = 'Banana');

order by和sub-query

2 个答案: