Question

我有一个动态SQL查询，它会根据需要返回结果，但唯一的问题是未按正确顺序选择结果数据透视列。

我正在使用SQL Server 2012。

以下是查询：

DECLARE @columns NVARCHAR(MAX), @columns_pivot NVARCHAR(MAX), @sql NVARCHAR(MAX);

SELECT @columns_pivot = COALESCE(@columns_pivot + ', ', '') + QUOTENAME(Week_No)
  ,@columns = COALESCE(@columns + ', ', '') + 'ISNULL(' + QUOTENAME(Week_No) + ',0) AS ' + QUOTENAME(Week_No) + ''
FROM (SELECT DISTINCT TOP 100 PERCENT DATEPART(wk,T_Date) As Week_No
   FROM [VISIT].[dbo].[Report]
   WHERE DATEPART(m,T_Date) = 5
   ORDER BY Week_No DESC) x; // This query returns Column 'Week_No' in order 22,21,20,19,18 (As Desired)
Edit: //But when Order By Clause is removed it returns 21,18,19,22,20 which is the actual output( Not Desired)

SET @sql = '
SELECT ABC, ' + @columns + '
FROM

 (Select TOP 100 PERCENT
 ABC
,SUM(CASE WHEN Type = A THEN Sum ELSE 0 END) AS Revenue
,DATEPART(wk,T_Date) As Week_No
 FROM [VISIT].[dbo].[Report]
 GROUP BY ABC
,DATEPART(wk,T_Date)
 ORDER BY Week_No DESC) As j 
 PIVOT(
 max(Revenue)
 FOR Week_No in (' + @columns_pivot + ')) As p '

最终结果按ABC，21,18,19,22,20

的顺序返回列

但我想要结果如ABC，22,21,20,19,18。

我看到的帖子很少，但无法弄清楚我的查询有什么问题。有人可以指出我必须在Query中更改以获得所需的输出。我究竟要在哪里放置ORDER BY子句

简而言之，当 Select Distinct 语句在Desc订单中返回 Week_No 列时，为什么变量 @columns 和 @columns_pivot < / strong>不按说明顺序获取

感谢。

Answer 1

我通过将Week_No存储在临时表中并对其应用聚簇索引来解决了该问题。这是我添加的代码：

IF OBJECT_ID('tempdb..#temp') IS NOT NULL
DROP TABLE #temp


SET NOCOUNT ON;
DECLARE @params nvarchar(max) = :month
SELECT DISTINCT TOP 100 PERCENT DATEPART(wk,Tour_Datum) As Week_No into #temp
FROM [VISITOUR].[dbo].[BI_001_ADM_Report]
WHERE DATEPART(m,Tour_Datum) = @params

--Clustered index is created on week_no in acending order, so that data is physically stored in that way
CREATE CLUSTERED INDEX cix_wekno ON #temp(Week_No ASC)

SQL Server SORT动态数据透视表列名称

1 个答案: