How to retrieve data from database with shortcode?

I would like retrieve data from a mysql database table, by using shortcode with attributes.

My database table is named “Prices” and contains these fields “Item”, “Price1”, “Price2” and “Price3”.

The function of the shortcode should be like this:
[Item1 attribute=”Price1″] should show Price1 of Item 1.
[Item2 attribute=”Price3″] should show Price3 of Item 2 etc. etc.

I this possible (I′m a newbie in this game)?
If possible, how should the code for this be?

Hope somebody can give me some hints for this.

Regards Brian