Databases

A database is an ordered data set that is stored and accessed electronically. It helps to store and manage large amounts of structured and unstructured information. There are various database management systems (DBMS) that provide a user and programming interface for working. SQL, a structured query language, is used to work with databases. There are different types of DBMS: relational, document-oriented, graph and others. The most famous MySQL, PostgreSQL, Oracle are relational DBMSs.