Today, I am going to describe how to generate random value for DATETIME field within a given range. This is very useful specially for generating test data. For this, we will use couple of built-in functions like:
- DATEDIFF
- DATEADD
- RAND
- ROUND
Random DATETIME Value
DECLARE @startDate DATETIME -- start date
DECLARE @endDate DATETIME -- end date
DECLARE @noOfSec INT -- variable
DECLARE @randomSec INT -- variable
SET @startDate = '2021-06-27 08:00 AM' -- assigning starting date
SET @endDate = '2021-06-27 08:30 AM' -- assigning end date
-- assigning end date -- Get the number of seconds within the date range
set @noOfSec = DATEDIFF(SECOND, @startDate, @endDate)
-- Get random seconds within the date range
set @randomSec = ROUND(((@noOfSec-1) * RAND()), 0)
-- Add the random seconds to get the random datetime value within the daterange
SELECT DATEADD(SECOND, @randomSec, @startDate)
Hope this will be useful for you. Happy TSQLing!
This is first published here