SQL means structured Query Language
SQL is Eigenljik a database query language. With SQL, you can retrieve and edit data from a (relational) database. Therefore, it is not a programming language, but you can call functions and create different scenarios. It is an ANSI/ISO standard language for DBMS (database management systems). In the beginning of the years 70 it was developed by IBM, and since then there have been several versions. In the middle of the years 80, a standard has come, and nowadays most of the system use SQL-92. Since each system has its own implementation, bits of SQL code are not easily exchanged between the different systems.