Importance of Databases and SQL

Relational databases

Ever since the practice of storing paper files in a physical file cabinet has been replaced, relational databases have given way to new ground. We use relational database management systems (RDBMS) in any place that stores or retrieves information, like a website login account or blog articles. It also gives a new platform and helps leverage websites like Wikipedia, Facebook, Amazon, and eBay.

Wikipedia, for instance, contains articles, links, and images, all of which are stored in a database. Facebook holds much of the same type of information, and Amazon holds the product information, payment ...