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

I really like:

[date] = CONVERT(VARCHAR(10), GETDATE(), 120)

The 120 format code will coerce the date into the ISO 8601 standard:

'YYYY-MM-DD' or '2017-01-09'

Super easy to use in dplyr (R) and pandas (Python)!