A database is a logically organised collection of structured data kept electronically in a computer system. A database management system is usually in charge of a database (DBMS). The data, the DBMS, and the applications that go with them are referred to as a database system, which is commonly abbreviated to just database. To make processing and data querying efficient, data in the most common types of databases in use today is often described in rows and columns in a sequence of tables. Data may then be accessed, managed, updated, regulated, and organised with ease. For writing and querying data, most databases employ structured query language (SQL).