what folders and files in module is reason for creating tables in database?

Question

I saw one module folders and files in magento connect. in that only etc, Helper, & Module folder is present.

but there is no sql folder. but still that module created a text box in backend , so that we can enter the zip codes in textfield and its going to be save in database.

so what is the reason behind that table. also how to find what is name of table craeted by that module ?

Answer 1

You don't necessarily need sql install/upgrade scripts to have variables stored in the database.

Creating fields for a module under etc/system.xml will let people save variables in the core_config_data database table without the need of a sql folder.