How we get difference of two datetime in sql server

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How i get difference of 20 mints in getdate and database column date but my server is in uk and my country time and uk server time is different. difference of my country time and server time is 2 hour

What I have tried:

SQL

select @currentdate=getDate();

Select LastAccess from session where CAST(lastAccess As Date)=Cast(@currentdate As Date)

select @different_MINT=datediff(mint,currentdate,LastAccess )

if @different_MINT > 20
Begin
// Update Query
END

Posted 8-Mar-16 20:24pm

awaisshabir

Updated 8-Mar-16 20:47pm

Maciej Los

v2

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Maciej Los 9-Mar-16 2:42am

sql server - sql timezone calculation - Stack Overflow[^]

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Maciej Los · Answer 1 · 2016-03-08T20:47:00

Try this:

SQL

DECLARE @datetoChange AS DATETIME
SELECT @datetoChange = '2009-01-01 12:00:00.000'

SELECT @datetoChange, 
	DATEDIFF(hh,GETUTCDATE(), GETDATE()) AS DIFFfromUTC, 
	DATEADD(hh,DATEDIFF(hh,GETUTCDATE(), GETDATE()),@datetoChange) AS modifiedDate

Source: SQL SERVER UTC date to local time zone[^]