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CSE 544: Lecture 10 Theory

CSE 544: Lecture 10 Theory. Wednesday, April 28, 2004. Conjunctive Queries. A subset of FO queries Correspond to SELECT-DISTINCT-FROM-WHERE Most queries in practice are conjunctive Some optimizers handle only conjunctive queries - break larger queries into many CQs

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506 views • 34 slides

Containment

Containment. CSE 590 DB Rachel Pottinger. Outline. Introduction Motivation Formal definition Algorithms for different complexities An application: rewriting queries using views. Containment, what is it?.

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246 views • 22 slides

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Queries q1 - PowerPoint PPT Presentation

CSE 544: Lecture 10 Theory

Containment