Magento

It is an open source platform written in PHP for the development of E-commerce website developed by Varien Inc. It was developed with the sole motive of providing the user with a better experience, smooth navigation, also to provide conversion and revenue rate.

Most of the time while working with Magento it requires having only one database. It prefers MYSQL/MariaDB. It provides excellent methods of adding new tables to the database and extend the old table.