so what front end (web app are you using)
ASP, PHP, HTML XHTML, CGI
what database backend are you using (MySQL, flat files, SQL server or whatever)
if you are starting from the very beginning I'd suggest you look at w3schools.com
this place isn't about teaching from scratch.. its about helping people resolve their problems. that doens't mean we won't help where we can but we will not be able to give you the time and help you need to learn to develop web sites from scratch
if you are desiging a database then I'd suggest
Fundamentals of Relational Database Design -- r937.com
or
The Relational Data Model, Normalisation and effective Database Design