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CSC 4402 20090914

CSC 4402 20090914 - unary RA operators Additional operators...

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CSC 4402 9/14/2009 Page 1 of 1 Query Languages Relational Algebra Expressions Consists of: Relation names/Constant relations Application of RA operators to (sub) RA expressions select (σ), project (Π), and rename (ρ) are
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Unformatted text preview: unary RA operators Additional operators: • Set intersection ∩ • Natural join • Division • Relational assignment ← Remember the concept of arity ....
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