How can I do a form to get the information from an existing database?

I've already had a database from a form that I created to get the personal information from my clients. I want to created a form to search from that database the information that I may need from my clients. 

PS: I know that I can download the database in .xls or .pdf format but I'm looking the way of doing that by using a form. If you have another idea to do it without downloading or opening the database I'm open to hear it. 

Thank you!

Hi,

Unfortunately, there is no direct method to pull data from your own database yet as the structure of your database is not known to us. If you have some programming background, the way to do it is create a PHP script that will pull data from your database.

You can then create a form that will catch your data. Once you have the form, you can get the source of the form and connect it with the PHP you created that gets data from your database so that it will populate your form as well. Please see How to get the Full Source Code of your Form.