SQL, Structured Query Language, is a database language. It is used to define, query and edit data. The data types in SQL are modeled after programming languages.
The term SQL refers to the English word “query”. Queries are used to retrieve data stored in a database and thereby make it available to the user or to user software.
The language is based on relational algebra. Their syntax is relatively simple and semantically based on English colloquial language. A joint body of ISO and IEC standardizes the language with the participation of national standardization bodies such as ANSI or DIN. The use of SQL aims to make applications independent of the database management system used.