What is SQL?

SQL stands for Structured Query Language.

SQL is a 4th generation programming language and it lets you access and manipulate databases.

The SQL programming language was first developed in the 1970s by IBM researchers

and is the most common method of accessing data in databases today.

SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987.

SQL can be used on a “Database Management System” or DBMS. A DBMS is a software interface that accesses a database so that you can run SQL queries on the data objects of a database. Some commonly used DBMS systems include SQL Server, Oracle, DB2, dBASE, PostgreSQL, MongoDB, and SQLite.

There are also many different dialects of SQL, some examples:

• IBM DB2: SQL PL dialect

• Oracle: PL/SQL dialect

• Microsoft SQL Server: T-SQL dialect

• PostgreSQL: PL/pgSQL dialect

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