'Query containment' diaporamas de présentation

CHAPTER 2: MANIPULATING QUERY EXPRESSIONS

CHAPTER 2: MANIPULATING QUERY EXPRESSIONS. PRINCIPLES OF DATA INTEGRATION. ANHAI DOAN ALON HALEVY ZACHARY IVES. Introduction. How does a data integration system decide which sources are relevant to a query? Which are redundant? How to combine multiple sources to answer a query?

1.04k views • 94 slides

CHAPTER 2: MANIPULATING QUERY EXPRESSIONS

CHAPTER 2: MANIPULATING QUERY EXPRESSIONS. PRINCIPLES OF DATA INTEGRATION. ANHAI DOAN ALON HALEVY ZACHARY IVES. Introduction. How does a data integration system decide which sources are relevant to a query? Which are redundant? How to combine multiple sources to answer a query?

1.12k views • 94 slides

Containment of Nested XML Queries

780 views • 59 slides

Searching and Integrating Information on the Web

Searching and Integrating Information on the Web. Seminar 2: Data Integration Professor Chen Li UC Irvine. Motivation. Biblio sever. Legacy database. Plain text files. Support seamless access to autonomous and heterogeneous information sources. Comparison Shopping. Applications.

650 views • 55 slides

Searching and Integrating Information on the Web

Searching and Integrating Information on the Web. Seminar 2: Data Integration Professor Chen Li UC Irvine. Motivation. Biblio sever. Legacy database. Plain text files. Support seamless access to autonomous and heterogeneous information sources. Comparison Shopping. Applications.

553 views • 55 slides

Topics covered

627 views • 48 slides

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

345 views • 34 slides

Containment of Conjunctive Queries on Annotated Relations

Containment of Conjunctive Queries on Annotated Relations. Todd J. Green University of Pennsylvania March 25, 2009 @ ICDT 09, Saint Petersburg. The Need for Data Provenance.

389 views • 30 slides

Containment of Conjunctive Queries on Annotated Relations

Containment of Conjunctive Queries on Annotated Relations. Todd J. Green University of Pennsylvania March 25, 2009 @ ICDT 09, Saint Petersburg. The Need for Data Provenance.

305 views • 30 slides

Conjunctive Queries

Conjunctive Queries. Thursday, February 8, 2001. Outline. Definition of conjunctive queries Query containment Query equivalence Query minimization. Picture So Far. Recursive queries. DATALOG. FO. Non-recursive Datalog. Non-monotone queries. Picture for This Lecture. DATALOG.

296 views • 29 slides

Decidable Containment of Recursive Queries

Decidable Containment of Recursive Queries. Diego Calvanese, Giuseppe De Giacomo, Moshe Y. Vardi presented by Axel Polleres http://www.dis.uniroma1.it/pub/calvanes/calv-degi-vard-ICDT-2003.pdf. Query Containment.

486 views • 17 slides

How to decide Quer y Containment under Constraints using a Description Logic

How to decide Quer y Containment under Constraints using a Description Logic. Ian Horrocks, Ulrike Sattler, Sergio Tessaris, and Stephan Tobies presented by Axel Polleres http://citeseer.ist.psu.edu/horrocks99how.html. Overview.

157 views • 15 slides