How do I pivot with hour format(HH:HourNumber)? - sql-server-2008

Question

I have OrderInfo table which contains OrderTime(date+time),OrderTrackDate(date),OrderTotal(sales amount) columns as shown in the following image.
1. Table1(Original Table)
Here is the code I have tried so far before pivoting.
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. Table 2(Grouped according to Date,Hour from Table1)
How do I pivot dynamically and show sales amount per hour based on Table2?
DESIRED OUTPUT

Answer 1

First of all create a temp table to use it in 3 places - Select columns for pivot, Replace null with zero and inside pivot.
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)
Now declare 2 variables to select columns for pivot and replace null with zero
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)
Now pivot the result
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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