We can use DATEADD() function like below to add minutes to DateTime in Sql Server. DATEADD() functions first parameter value can be minute or mi or n all will return the same result. Below example shows how we can add two minutes to Current DateTime in Sql Server:
SELECT GETDATE() 'Now',
DATEADD(minute,2,GETDATE()) 'Now + 2 Minutes'
SELECT GETDATE() 'Now',
DATEADD(mi,2,GETDATE()) 'Now + 2 Minutes'
SELECT GETDATE() 'Now',
DATEADD(n,2,GETDATE()) 'Now + 2 Minutes'
DATEADD(minute,2,GETDATE()) 'Now + 2 Minutes'
SELECT GETDATE() 'Now',
DATEADD(mi,2,GETDATE()) 'Now + 2 Minutes'
SELECT GETDATE() 'Now',
DATEADD(n,2,GETDATE()) 'Now + 2 Minutes'