Data and Database
The data layer is a massive warehouse of information. It contains a database repository which captures and stores information from the front-end, through the back-end. A prerequisite is to have knowledge of how data is stored, edited, retrieved, etc. An understanding of Databases such as MySQL, MongoDB is a must
MySQL
MySQL is an open-source, Relational Database Management System that provides multi-user access and supports multi storage engines.
MongoDB
MongoDB is known for its ease of use and its quickness in handling a large amount of data. It is an open-source, object-oriented, NoSQL database which is highly scalable and is efficient in handling unstructured data.