Radius / SQL question for Calls Table

Postman Account ( postman@cp-tel.net )
Tue, 25 Aug 1998 12:31:29 -0500

Do you have to shut down RadiusNT to delete old calls table
information from the SQL database? (...for the previous month)

Also, is there a command to automate the deletion process... such
as a variable... or statement... to delete the previous month's call data?
....as opposed to having to specifiy the previous month by name.

Thanks in advance...