how to work with databases and websites to get customers input?

Answer 1

general
1) step create database
2) create table
3) create html form
4) write scripts
4.a)for validateing the form input
4.b)for connecting to database
4.c)to insert the record into database
4.d) inform the submitter of the status of insertion(implied)

Answer 2

Could you narrow your question down a bit Alex? I could type the thousand page book on database manegement, or tell you to read the one on your shelf. That much typing would make my hands too sore to type for a while.

no harm, no foul.