PPT-Perk: Personalized Keyword Search in Relational Databases t

Marina Drosou Computer Science Department University of Ioannina Greece Joint work with Kostas Stefanidis and Evaggelia Pitoura httpdmodcsuoigr Now at the Chinese University of Hong Kong. Also formal definitions of insertion anomaly and deletion anomaly are presented It is shown that a schema is in DKNF if and only if it has no insertion or deletion anomalies Unlike previously defined normal forms DKNF is not defined in terms of trad Slide . 1. Relation (Table). name. birth. gpa. grad. Anderson. 1987-10-22. 3.9. 2009. Jones. 1990-4-16. 2.4. 2012. Hernandez. 1989-8-12. 3.1. 2011. Chen. 1990-2-4. 3.2. 2011. VARCHAR(30). DATE. FLOAT. Seminar: Transaction Processing (Bachelor). SS 2009. Dennis . Stratmann. Outline. Goal and Overview. Examine Three Approaches to CC on RD:. 1. Predicate-Oriented Concurrency Control. 2. Relational Update Transactions. Jinyun Yan. Wei Chu. Ryen White. Rutgers University. Microsoft Bing. Microsoft Research. Personalized Search. Many queries have multiple intents. e.g., [H2O] can . be a beauty . product, wireless, water, movie, band, etc.. Marina . Drosou. Computer Science Department . University of . Ioannina. , Greece. Joint work with . Kostas . Stefanidis. *. and . Evaggelia. . Pitoura. http://dmod.cs.uoi.gr. * Now at the Chinese University of Hong Kong. E. lectrosurgery. K. Carter, A. Lasso, T. . Ungi. , E. Morin, G. Fichtinger. Research Problem. Physiological and pathological monitoring. Temporally and spatially monitor the tracked electrosurgical . Nothing is so practical as a good theory. Kurt Lewin, 1945. The relational model. Overcame shortcomings of earlier database models. Has a strong theoretical base. Codd was the major developer. Problems with other models. in Large Networks. Minhao Jiang. †. , Ada . Wai. -Chee Fu. ‡. , Raymond Chi-Wing Wong. †. † . The Hong Kong University of Science and Technology, . ‡ . The Chinese University of Hong Kong. Distinguish between the physical and logical views of . data.. Describe how data is organized: characters, fields, records, tables, and . databases.. Define key fields and how they are used to integrate data in a database.. Universal Search Techniques. Precision- getting results that are relevant, “on topic.”. Recall- getting all of the relevant results, i.e. not being too narrow in search scope. Subject vs. Keyword. Relational/XML Databases are structured or semi-structured, with rich meta-data
Typically accessed by structured
query languages: SQL/XQuery Slide . 1. Relation (Table). name. birth. gpa. grad. Anderson. 1987-10-22. 3.9. 2009. Jones. 1990-4-16. 2.4. 2012. Hernandez. 1989-8-12. 3.1. 2011. Chen. 1990-2-4. 3.2. 2011. VARCHAR(30). DATE. FLOAT. Stefano Grazioli. Critical thinking. ‘Big ERD’ graded. Questions about the next assignment. Identifying / non-identifying relationships. Regular class on Nov 22. 2. Literacy. Big data. Data lake. kindly visit us at www.nexancourse.com. Prepare your certification exams with real time Certification Questions & Answers verified by experienced professionals! We make your certification journey easier as we provide you learning materials to help you to pass your exams from the first try.