在 SQL 的动态查询中排名

Question

我正在尝试构建动态查询并基于其中一列创建排名这是我目前的代码

/*Declare Variable*/
DECLARE @DynamicPivotQuery AS NVARCHAR(MAX), 
        @PivotColumnNames AS NVARCHAR(MAX),
        @PivotSelectColumnNames AS NVARCHAR(MAX),
        @Week_Value AS NVARCHAR(MAX),
        @Rank AS NVARCHAR(MAX)


--Get distinct values of the PIVOT Column
SELECT @PivotColumnNames= ISNULL(@PivotColumnNames + ',','')+ QUOTENAME([W])
    FROM (SELECT DISTINCT [W] FROM [Server].[dbo].[Table]) AS cat
        ORDER BY [W]

--Get distinct values of the PIVOT Column with isnull
SELECT @PivotSelectColumnNames = ISNULL(@PivotSelectColumnNames + ',','')+ 'ISNULL(' + QUOTENAME([W]) + ', 0) AS '+ QUOTENAME([W])
    FROM (SELECT DISTINCT [W] FROM [Server].[dbo].[Table]) AS cat
        ORDER BY [W]

--Get current week value
SET @Week_Value = SUBSTRING(@PivotColumnNames,81,15)
--PRINT @Week_Value --Make sure value is correct 

--Get the ranking for previews week
SET @Rank = 0 -- this initialize the rank

--Prepare the PIVOT query using the dynamic 
SET @DynamicPivotQuery = '
SELECT TOP 200 [L], [Doc_ID], '+@PivotSelectColumnNames+','+@Rank+' AS RNK
   FROM   
    (SELECT [L], 
            [Doc_ID],
            [W],
            ISNULL(CAST([PV] AS INT),0) AS [Page_Views] 
        FROM [Server].[dbo].[Table]
            WHERE LEN([Doc_ID]) = 8 OR LEN([Doc_ID]) = 9)Tab1  
PIVOT  
(  
SUM([Page_Views])
FOR [Week] IN ('+@PivotColumnNames+')
) AS Tab2
ORDER BY '+@Week_Value+' DESC'

--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery

所以问题是排名是静态的，我不知道如何在每一行中求和 +1，排名必须根据 @PivotColumnNames 顺序设置，这是我的数据样本到目前为止应用上面的代码

L	Doc_ID	Week 12, 2021	Week 13, 2021	Week 14, 2021	Week 15, 2021	RNK
en	c03722645m	191867	168145	188472	185189	0
fr	c03746609	55908	53467	56678	56028	0

这就是我想要的

L	Doc_ID	Week 12, 2021	Week 13, 2021	Week 14, 2021	Week 15, 2021	RNK
en	c03722645m	191867	168145	188472	185189	1
fr	c03746609	55908	53467	56678	56028	2

如有任何帮助或建议，我们将不胜感激

Answer 1

您好 TSQL 中有多个 Ranking 选项可用。您遇到的问题必须根据您的要求确定所需的排名功能。我将在这个眼周解决方案中使用 RANK() 函数

/*Declare Variable*/
DECLARE @DynamicPivotQuery AS NVARCHAR(MAX), 
        @PivotColumnNames AS NVARCHAR(MAX),
        @PivotSelectColumnNames AS NVARCHAR(MAX),
        @RankingSelectColumn AS VARCHAR(MAX), --Create ranking statement (Added)
        @Week_Value AS NVARCHAR(MAX),
        @Rank AS NVARCHAR(MAX)


--Get distinct values of the PIVOT Column
SELECT @PivotColumnNames= ISNULL(@PivotColumnNames + ',','')+ QUOTENAME([W])
    FROM (SELECT DISTINCT [W] FROM [Server].[dbo].[Table]) AS cat
        ORDER BY [W]

   --Make Ranking logic depending on the rank change ASC or DESC
    SELECT @RankingSelectColumn = ISNULL(@RankingSelectColumn + ' ASC,','')+ 'ISNULL(' + QUOTENAME([W]) + ', 0) AS '+ QUOTENAME([W])
    FROM (SELECT DISTINCT [W] FROM [Server].[dbo].[Table]) AS cat
        ORDER BY [W]


--Get distinct values of the PIVOT Column with isnull (Added)
SELECT @PivotSelectColumnNames = ISNULL(@PivotSelectColumnNames + ',','')+ 'ISNULL(' + QUOTENAME([W]) + ', 0) AS '+ QUOTENAME([W])
    FROM (SELECT DISTINCT [W] FROM [Server].[dbo].[Table]) AS cat
        ORDER BY [W]

--Get current week value
SET @Week_Value = SUBSTRING(@PivotColumnNames,81,15)
--PRINT @Week_Value --Make sure value is correct 

--Get the ranking for previews week
SET @Rank = 0 -- this initialize the rank

--Prepare the PIVOT query using the dynamic (Added Rank function)
SET @DynamicPivotQuery = '
SELECT TOP 200 [L], [Doc_ID], '+@PivotSelectColumnNames+',RANK() OVER('+@RankingSelectColumn+') AS RNK
   FROM   
    (SELECT [L], 
            [Doc_ID],
            [W],
            ISNULL(CAST([PV] AS INT),0) AS [Page_Views] 
        FROM [Server].[dbo].[Table]
            WHERE LEN([Doc_ID]) = 8 OR LEN([Doc_ID]) = 9)Tab1  
PIVOT  
(  
SUM([Page_Views])
FOR [Week] IN ('+@PivotColumnNames+')
) AS Tab2
ORDER BY '+@Week_Value+' DESC'

--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery

这将根据列逻辑排名

在 SQL 的动态查询中排名

Rank in dynamic query in SQL

sql

tsql

sql-server

dynamic-sql