What todo with users whilst updating database

[eluser]ciPhil[/eluser]
Hi,
I am new to this so am trying to work on a simple project.

I will be deleting the contents of a small web hosted table and reinserting modified data every hour.

How should I deal with users that are looking at this data.?
only one database allowed on my hosting.

It is the stratergy I need then I can work on learning the implementation.

Cheers
phil