rfid interafcing with arduino using database

Hi there..
An RFID reader is interfaced with Arduino, I want to use many RFID tags.. For each tag ID, I want to assign several details such like Item No, Name, Weight, Price.. I can create a database using Microsoft Excel or MySQL to have the details as I mentioned above of specific RFID tag's IDs. My question is, When I read the a tag using RFID Reader, how can I connect to database and access the specific details of the tag in the serial terminal of the arduino? Please help me out

There is an existing library for accessing a MySQL database, but you will need an ethernet shield.

If you want to use the serial port only, you could write your own "bridge" component on the PC to accept serial commands and return the data that you want from whatever database you like.