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OpenLearn - The Open University. Internet Security and Ethical Hacking. SQL Tutorial - SQL Query Reference and Programming Examples. SQL (Structured Query Language) is a computer language aimed to store, manipulate, and query data stored in relational databases.
The first incarnation of SQL appeared in 1974, when a group in IBM developed the first prototype of a relational database. The first commercial relational database was released by Relational Software (later becoming Oracle). Standards for SQL exist. However, the SQL that can be used on each one of the major RDBMS today is in different flavors. Online Web Tutorials - Free Online Web Tutorials.