how to link PDF document with SQL database?

Question

Hello. I'm researching for the new VB project and hoping to get some answers. We have a lot of PDF documents and would like to save information filled in by the user in SQL database and then pre-populate the answers in multiple PDFs for printing. We'd also want user to digitally sign the pdf and store the signature in database. Ideally I'd like to create VB project with form that users would fill in and then information should "flow" into existing PDF. Then later I'd setup some reports based on user-filled information. We probably will purchase Adobe LifeCycle software to use with PDF. Please advise! If it's a wrong place for such posting - please let me know.