SQL is a special-purpose programing language used for the management of data within either a stream or database type relational management system. Basically, think of SQL as a set of instructions used to interact with relational databases. SQL was first designed in the early 1970s by Donald D. Chamberlin and Raymond F. Boyce, who worked for IBM. Later, in the 1970s Oracle developed their own version. SQL was adopted as a standard by the American National Standards Institute (ANSI) in 1986. One of the most common applications of SQL is used by database-driven dynamic web pages. When a user inputs data into a text field on a web page, an SQL query retrieves the information from the database and uses it to generate the next web page. SQL is comprised of three different types of languages. These languages are: data definition language, data manipulation language, and data control language...
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