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CSE 544: Lecture 8

CSE 544: Lecture 8. Theory. Review of Relational Algebra. Five basic RA operators: ?, -, s, p , ?. Find all employees with salary more than $40,000. s Salary > 40000 (Employee). P SSN, Name (Employee). Renaming Example. Employee. Name. SSN. John. 999999999. Tony. 777777777.

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Lecture 9: Query Complexity

Lecture 9: Query Complexity. Tuesday, January 30, 2001. Outline. Properties of queries Relational Algebra v.s. First Order Logic Classical Logic v.s. Logic on Finite Models Query Complexity start today, finish Thursday Reading assignment: Sections 1-3 from the paper. A Note on Notation.

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475 views • 36 slides

A new class of lineage expressions over probabilistic databases computable in PTIME

A new class of lineage expressions over probabilistic databases computable in PTIME. SUM 2013 Batya Kenig Avigdor Gal Ofer Strichman. Probabilistic Databases for managing uncertain data.

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332 views • 25 slides

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Safe queries - PowerPoint PPT Presentation

CSE 544: Lecture 8

Lecture 9: Query Complexity

A new class of lineage expressions over probabilistic databases computable in PTIME