I need a database raporting tool/script

[jobi]

I have a lot of information about my customers.

I want the customers to see this information on the Internet. But I want them to see only "their own" information, not the information I've stored about other customers.

To do this I need:
A query tool/script that prompts for a login.
The login is connected to the query, and the query returns only information that corresponds with the login.

I haven't decided what kind of database I'm gonna use, so this can be almost anything.

Do you know of any tool or script that can do this for me?

(I can NOT make a webpage per customer - there are too many customers, and I don't want to make a new page every time i get a new customer. I only want to make a new login.)

 

[TheConeHead]

You can achieve this through a database (SQL is good) and simple coding (ASP, PHP, CF...)