In web development, most databases use the relational database management system (RDBMS) to organize data and programming in SQL . Some databases, however, don't follow the former mechanism to organized data, which called NoSQL.

Some famous server-side RDBMS are MySQL (or MariaDB which is a fork of it), SQL Server , and Oracle Database . On the other hand, some famous NoSQL examples are MongoDB , Cassandra , and Redis .

Browsers also have their own database system called IndexedDB .