What's a good way to check if two datetimes are on the same calendar day in TSQL?

Question

Here is the issue I am having: I have a large query that needs to compare datetimes in the where clause to see if two dates are on the same day. My current solution, which suck

Answer 1

this will remove time component from a date for you:

select dateadd(d, datediff(d, 0, current_timestamp), 0)