Compare datetime field with date(Fetch Duplicate request)

I have a datetime field in DB. When user selects datetime from interface, i want to make sure that date doesn't already exist in DB. Basically, i am trying to fetch duplicate requests for a day. 

I cannot use "=" operator since field is of datetime type not date and if i use other operators such as startswith, in, includes , it gives me error i.e. Cannot apply operator [INCLUDES] to field [dateTime] when comparing to value [TypedValue[it=9,v=2024-07-05 05:00:00.0]].