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Structured Query Language is used to access and manipulate databases. SQL is both an ANSI and an ISO standard; many database products support SQL with proprietary extensions to the standard language.
Queries take the form of a command language that lets you select, insert, update, find out the location of data, and so forth. Almost all modern Relational Database Management Systems like MS SQL Server, Microsoft Access, MSDE, Oracle, DB2, Sybase, MySQL, and Informix use SQL as standard database language.
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