Best approach to remove time part of datetime in SQL Server

Question

Which method provides the best performance when removing the time portion from a datetime field in SQL Server?

a) select DATEADD(dd, DATEDIFF(dd, 0, getdate(         


        

Answer 1

Just in case anyone is looking in here for a Sybase version since several of the versions above didn't work

CAST(CONVERT(DATE,GETDATE(),103) AS DATETIME)

• Tested in I SQL v11 running on Adaptive Server 15.7