Chapter 1. SQL and Data

Before getting started writing SQL statements, it is beneficial to introduce some basic database concepts and review the history of databases.

What Is SQL?

SQL (pronounced “sequel”) is an acronym for Structured Query Language, a standardized language used to access and manipulate data. The history of SQL corresponds closely with the development of a relational databases concept published in a paper by Dr. E. F. Codd at IBM in 1970. He applied mathematical concepts to the specification of a method for data storage and access; this specification, which became the basis ...

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