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Datalog

Datalog. Inspired by the impedance mismatch in relational databases. Main expressive advantage: recursive queries. More convenient for analysis: papers look better. Without recursion but with negation it is equivalent in power to relational algebra

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375 views • 11 slides

Row Types in SQL-3

Row Types in SQL-3. Row types define types for tuples, and they can be nested. CREATE ROW TYPE AddressType{ street CHAR(50), city CHAR(25), zipcode CHAR(10) } CREATE ROW TYPE PersonType{ name CHAR(30), address AddressType,

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183 views • 10 slides

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Datalog

Row Types in SQL-3