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Database Management Systems Relational Algebra Cheat Sheet

Sandra Watson
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University of New England (Australia)

Database Management Systems (COSC210)

using relational algebra, we can define data retrieval requests in an
implementation-independent manner through relational algebra expressions

many of the constructs from relational algebra are directly
implemented within SQL

– SQL should be viewed as an implementation based upon relational algebra
relational algebra provides a formal foundation for the relational model data
manipulation operations

it provides a basis for defining the transformations for optimising queries
within the query processing modules in a DBMS

relational algebra is focused on the specification of the operations on a
relational database



Database Management Systems (COSC210) L7 - Relational Algebra Cheat Sheet

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