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How To Calculate How Many Minutes Have Passed Since Midnight With Datetime In SQL
From Wiki
If it is now June 25th 10:40 AM, how many minutes have elapsed since midnight?
Easy to figure out
(Hour * 60) + minutes
(10 * 60) + 40
So how do you do this in SQL?
You will have to get the date value, strip of the time and then use DATEDIFF to get the difference in minutes
Here is the code that will demonstrate this
- DECLARE @d DATETIME
- SELECT @d = '2008-06-25 10:40:57.583'
- SELECT DATEDIFF(mi,CONVERT(VARCHAR(10),@d,112),@d)
There is another way, you can use datepart hour * 60 + datepart minute
Take a look
- DECLARE @d DATETIME
- SELECT @d = '2008-06-25 10:40:57.583'
- SELECT (DATEPART(hh,@d) * 60) + DATEPART(mi,@d)
Both of the code blocks return 640
Contributed by: --SQLDenis 14:49, 25 June 2008 (GMT)
Part of SQL Server Programming Hacks
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