Manager and administrator is a common database roles. They allow one person to create database and other to manage it's online. You can also provide read only access to your DB
You can relate the tables if your tables have columns with the same values
Conditional Actions enables you to send email- or SMS-notifications, show custom message or redirect to URL based on a defined criteria after each record cell value creation or update.
In this article, you will learn how to integrate widgets into your web page
Field rules in online database. Build complex conditional logic for your web-forms with easy-to-use UI