update and insert time

Hello,

I would like to know under what circumstances, or type of applications, etc... that I should only update or insert rows to tables in the database at certain time such as at night when no one or only few users using and access information from database?

Thank in advance,
John

If you are using Access and ASP it isn't a good idea to have more than two or three connections to it at the same time.
Anything else (including MySQL) works fine with hundreds of requests at the same time.
So there's no need to just use the database during low or no traffic times.
Unless you're Google....