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Yes you can easily achieve this
1) Create an stackflow in code
2) Add controls to the stackflow (in this case 5 text boxes) or 3 depending on what you need
3) Add an event handler in the textbox lost focus
4) Add code in the above event handler to go to a web service (you can use WCF RIA Services) and fetch the data from database
5) To update database you again have to use Web Service as from Silverlight you do not get access to the data base directly and the database is on the server has to be accessed by WCF or ASP.NET.