Combining (concatenating) date and time into a datetime

Question

Using SQL Server 2008, this query works great:

select CAST(CollectionDate as DATE), CAST(CollectionTime as TIME)
from field

Gives me two co

Answer 1

An easier solution (tested on SQL Server 2014 SP1 CU6)

Code:

DECLARE @Date date = SYSDATETIME();

DECLARE @Time time(0) = SYSDATETIME();

SELECT CAST(CONCAT(@Date, ' ', @Time) AS datetime2(0));

This would also work given a table with a specific date and a specific time field. I use this method frequently given that we have vendor data that uses date and time in two separate fields.