如何以小時格式（HH：HourNumber）進行轉換？

Question

我有OrderInfo表，其中包含OrderTime（日期+時間），OrderTrackDate（日期），OrderTotal（銷售額）列，如下圖所示。

表1 1.（原稿臺）

這裏是我已經樞轉之前到目前爲止已經試過的代碼。

SELECT CAST(DATEPART(DAY, OrderTime) as varchar)+'/'+ CAST(DATEPART(MONTH, OrderTime) as varchar)+'/'+CAST(DATEPART(year,OrderTime) as varchar) as daymonthyear, 
ROUND(SUM(OrderTotal),2) AS Sales, COUNT(OrderTotal) AS Orders 
,datepart(hour,OrderTime) as HH 
FROM OrderInfo where OrderTime >= '5/24/2013' AND OrderTrackDate <='5/30/2013' 
GROUP BY DATEPART(year, OrderTime),DATEPART(MONTH, OrderTime),DATEPART(day, OrderTime),datepart(hour,OrderTime) 
Order By daymonthyear,HH 

2.表2（按日期分組，一小時內，表1）

如何動態地轉動基於Table2每小時展示銷售金額是多少？

所需的輸出

Answer 1

首先，創建一個臨時表來使用它在3個地方 - 選擇列支點，替換空零和內部支點。

SELECT DISTINCT 
SUM(ORDERTOTAL) OVER(PARTITION BY CAST(ORDERTIME AS DATE),DATEPART(HH,ORDERTIME)) [TOTAL], 
CONVERT(varchar, CAST(ORDERTIME AS datetime), 103) [DATE], 
DATEPART(HH,ORDERTIME) [HOUR], 
'HH:'+CAST(DATEPART(HH,ORDERTIME) AS VARCHAR(3)) [HOURCOL] 
INTO #NEWTABLE 
FROM ORDERTBL 
ORDER BY DATEPART(HH,ORDERTIME) 

現在宣佈2個變量來選擇旋轉柱，以零

DECLARE @cols NVARCHAR (MAX) 
DECLARE @NullToZeroCols NVARCHAR (MAX) 

SELECT @cols = COALESCE (@cols + ',[' + [HOURCOL] + ']', 
       '[' + [HOURCOL] + ']') 
       FROM (SELECT DISTINCT [HOUR],[HOURCOL] FROM #NEWTABLE) PV 
       ORDER BY [HOUR] 

SET @NullToZeroCols = SUBSTRING((SELECT ',ISNULL(['+[HOURCOL]+'],0) AS ['+[HOURCOL]+']' 
FROM(SELECT DISTINCT [HOUR],[HOURCOL] FROM #NEWTABLE GROUP BY [HOUR],[HOURCOL])TAB 
ORDER BY [HOUR] FOR XML PATH('')),2,8000) 

替換空現在轉動的結果

DECLARE @query NVARCHAR(MAX) 
SET @query = 'SELECT [DATE],' + @NullToZeroCols + ' FROM 
      (
       SELECT [HOURCOL],[TOTAL], [DATE] FROM #NEWTABLE 
      ) x 
      PIVOT 
      (
       SUM([TOTAL]) 
       FOR [HOURCOL] IN (' + @cols + ') 
      ) p 
      ;' 

EXEC SP_EXECUTESQL @query 

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