How to get Hourly data in Sql Server

This article demonstrate how to get hourly data in Sql Server in different formats as shown in the below image. Here Sales table data is presented in two different hourly aggregated sales data formats.

Hourly Sales Data in Sql Server

Let us create a Sales table and insert 1000 Sample Sales Records With Random sales date in the past 60 hours using the below script.

CREATE DATABASE SqlHintsHourlyData
GO
USE SqlHintsHourlyData
GO
--Create Temporary Sales Table
CREATE TABLE #Sales
(SalesId INT IDENTITY(1,1), SalesDate DateTime)
GO
--Populate 1000 Sample Sales Records With
--Random past 0-60 hours as sales date
INSERT INTO #Sales(SalesDate)
VALUES(DATEADD(hh, - ROUND(60 * RAND(), 0),GETDATE()))
GO 1000

Demo 1: Getting Hourly Data using Group By

SELECT CAST(SalesDate AS DATE) [Date], 
    DATEPART(hour,SalesDate) [Hour], Count(1)  [Sales Count]   
FROM #Sales
GROUP BY CAST(SalesDate AS DATE), DATEPART(hour,SalesDate)
ORDER BY 1 ,2

RESULT:
Hourly Data Sql Script

Demo 2: Getting Hourly Data using Static PIVOT

[ALSO READ] PIVOT and UNPIVOT in Sql Server
Format 1: Dates as column

SELECT *
FROM (SELECT CAST(SalesDate AS DATE) [Date], 
   DATEPART(hour,SalesDate) [Hour], Count(1)  [Sales Count]   
   FROM #Sales
   GROUP BY CAST(SalesDate AS DATE), 
         DATEPART(hour,SalesDate)) AS HourlySalesData
PIVOT( SUM([Sales Count])   
  FOR [Date] IN ([2015-07-01], [2015-07-02], 
  [2015-07-03])) AS DatePivot

RESULT:
Hourly Data in Sql by using Static Pivot
Format 2: Hours as column

SELECT *
FROM (SELECT CAST(SalesDate AS DATE) [Date], 
   DATEPART(hour,SalesDate) [Hour], Count(1)  [Sales Count]   
   FROM #Sales
   GROUP BY CAST(SalesDate AS DATE), 
         DATEPART(hour,SalesDate)) AS HourlySalesData
PIVOT( SUM([Sales Count])   
  FOR [Hour] IN ([0], [1], [2], [3], [4], [5], [6], [7],
     [8], [9], [10],[11], [12], [13], [14], [15], [16], 
	 [17], [18], [19], [20], [21], [22], [23])) AS DatePivot

RESULT:
Hourly Data in Sql by Dynamic Pivot

Demo 3: Getting Hourly Data using Dynamic PIVOT

[ALSO READ] Dynamic PIVOT in Sql Server

Problem with Demo 2 approach is , it is using the static PIVOT to get the data. Which requires the developer to specify all the dates or hours as the pivot columns manually. We can re-write the Demo 2 examples by using Dynamic pivot approach as below which doesn’t require the developer to manually specify the dates/hours column.

Format 1: Dates as column

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)

SELECT CAST(SalesDate AS DATE) [Date], 
   DATEPART(hour,SalesDate) [Hour], Count(1)  [Sales Count]   
	INTO #PivotSalesData
FROM #Sales
GROUP BY CAST(SalesDate AS DATE), DATEPART(hour,SalesDate)
--Get distinct values of the PIVOT Column 
SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
       + QUOTENAME([Date])
FROM (SELECT DISTINCT [Date] FROM #PivotSalesData) AS Dates
--Prepare the PIVOT query using the dynamic 
SET @DynamicPivotQuery = 
  N'SELECT [Hour], ' + @ColumnName + '
    FROM #PivotSalesData
    PIVOT(SUM( [Sales Count]   ) 
          FOR [Date] IN (' + @ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery

RESULT:
Hourly Data in Sql by using Static Pivot
Format 2: Hours as column

DECLARE @DynamicPivotQuery AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)
SELECT CAST(SalesDate AS DATE) [Date], 
   DATEPART(hour,SalesDate) [Hour], Count(1)  [Sales Count]   
	INTO #PivotSalesData
FROM #Sales
GROUP BY CAST(SalesDate AS DATE), DATEPART(hour,SalesDate)
--Get distinct values of the PIVOT Column 
SELECT @ColumnName= ISNULL(@ColumnName + ',','') 
       + QUOTENAME([Hour])
FROM (SELECT DISTINCT [Hour] FROM #PivotSalesData) AS Dates
--Prepare the PIVOT query using the dynamic 
SET @DynamicPivotQuery = 
  N'SELECT [Date], ' + @ColumnName + '
    FROM #PivotSalesData
    PIVOT(SUM( [Sales Count]   ) 
          FOR [Hour] IN (' + @ColumnName + ')) AS PVTTable'
--Execute the Dynamic Pivot Query
EXEC sp_executesql @DynamicPivotQuery

RESULT:
Hourly Data in Sql by Dynamic Pivot

[ALSO READ]:
How to get Yearly data in Sql Server
How to get Quarterly Data in Sql Server
How to get Monthly Data in Sql Server
How to get Daily data in Sql Server

4 thoughts on “How to get Hourly data in Sql Server

Leave a Reply

Your email address will not be published.