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SQL Tutorial by w3schools. SQL ( Structured Query Language ) is a standard language for accessing databases. SQL is an ANSI ( American National Standards Institute ) standard. Although SQL is an ANSI standard, there are different versions of the SQL language. However, to be compliant with the ANSI standard, they all support at least the major commands (such as SELECT, UPDATE, DELETE, INSERT, WHERE) in a similar manner. Most of the SQL database programs also have their own proprietary extensions in addition to the SQL standard! Our SQL tutorial will teach you how to use SQL to access and manipulate data in: MySQL, SQL Server, Access, Oracle, Sybase, DB2, and other database systems.
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