If you have the SQL toolkit it is quite easy to communicate to database.
First if you don't know the basics of SQL language I suggest you to buy a dedicated book, there are many, and concentrate on SELECT, INSERT commands.
Second you have to configure the ODBC to make your Access database be accessible from other applications (LV).
Then you can start using the easy SQL vi to rethrive (SELECT) or insert data in your database. You could also train with the database browser of the SQL toolkit.
This is just an introduction on the first approach to SQL communication with LV, if you need some more detailed information get in touch directly with me.
altek@tin.it