Just a week ago, my Database Team member asked me what is the best way to only select date part from datetime. When ran following command it also provide the time along with the date.
ResultSet: 2007-06-10 7:00:56.107
The required outcome was only 2007/06/10.
I asked him to come up with solution by using date functions. The method he suggested was to use
SELECT DATEADD(D, 0, DATEDIFF(D, 0, GETDATE()))
I approved his method though, I finally suggested my method using function CONVERT.
The reason I use this because it is very convenient as well as provides quick support to convert the date in any format. The table which suggests many formats are displayed on MSDN.
Some claims that using CONVERT is slower than using DATE functions, but it is extremely negligible. I prefer to use CONVERT.
Here is the video discussing the same concepts.
Let me know what is your favorite method to select only date part from datetime. I would like to know what are the different methods and if any other method is interesting I will be happy to blog about that in the future with due credit.
Here is Part 2 of the blog post: SQL SERVER – Retrieve – Select Only Date Part From DateTime – Best Practice – Part 2.
In SQL Server 2008 we also have a new datatype of Date and Time, which can be very handy if you are using SQL Server 2008 or later versions. You can read about that in this blog post SQL SERVER – DATE and TIME in SQL Server 2008.
Reference: Pinal Dave (http://blog.SQLAuthority.com)