sql server - How do I get the minute difference between 2 times in T SQL?

Question

How do I get the "minutes" difference between 2 times in T SQL? I tried DATEDIFF, but it obviously wants dates. This would be the difference in minutes between 2 times in a day. Any suggestions?

Answer 1

DateDiff not only work with Date datatype it even accepts TIME datatype.

Even if your datatype is nvarchar it will work but it should be a valid time.

Simple Demo

create table time_test(a nvarchar(50),b nvarchar(50))

insert time_test values ('4:00 PM','4:30 PM')

select datediff(minute,a,b) from time_test --30