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SQL Tools Help
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... Sybase® is a trademark of Sybase, Inc. Adobe Acrobat® is a trademark of Adobe Systems Incorporated All brand names and product names that are used in this document are trade names, service marks, or registered trademarks of their respective owners. Other trademarks may have been inadvertently used i ...
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Relational algebra

Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it.The main application of relational algebra is providing a theoretical foundation for relational databases, particularly query languages for such databases, chief among which is SQL.
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