Remove Characters from a Date

Question

What are some ways that I could remove the hyphens, semicolons, periods, and empty strings from a date (in a single expression)?
If I have a date (returned from GETDATE()) as follows:
2014-09-15 16:53:09.253
I want to remove the non-numeric characters and return this:
20140915165309253
Can REPLACE be used to identify more than one character pattern to replace?
Thank you for your help!
cdun2

Answer 1

Another way, don't remove at all, begin with just the requisite dateparts and datenames. Although either way works fine, this way gives you absolute control over how you render.
In this example, the "from sys.messages" is not part of the answer, I just included it to recreate a test to compare speeds.  It ends up having the same speed/execution plan/actual CPU time used either way. 
The "Right()" functions are required, because for example, if the time is 8:03, the "03" is presented as just "3", so you have to force it to render as "03" with the Right function.  The DatePart(month) is the
only one returning an integer result, so that must be cast as Varchar, the DateName() functions return a string, although unfortunately with leading zeroes removed.
Select Datename(year, SysDateTime())
+ Right('0' + Cast(DatePart(month, SysDateTime()) as varchar(2)) , 2)
+ Right('0' + DateName(day, SysDateTime()), 2)
+ Right('0' + DateName(hour, SysDateTime()), 2)
+ Right('0' + DateName(minute, SysDateTime()), 2)
+ Right('0' + DateName(second, SysDateTime()), 2)
+ Right('0' + DateName(ms, SysDateTime()), 3) , sysdatetime()
from sys.messages sm1
Select REPLACE(REPLACE(REPLACE(REPLACE(CONVERT(VARCHAR(30), GETDATE(), 121),'-',''),':',''), '.',''),' ',''), sysdatetime()_
from sys.messages sm1