By Luca Cardelli (auth.), Richard Connor, Alberto Mendelzon (eds.)
This e-book constitutes the completely refereed post-proceedings of the seventh foreign Workshop on Database Programming Languages, DBPL'99, held in Kinloch Rannoch, united kingdom in September 1999. The 17 revised complete papers provided including an invited paper have been rigorously reviewed and revised for inclusion within the booklet. The ebook provides topical sections on querying and question optmization; languages for record types; endurance, elements and workflows; typing and querying semistructured facts; energetic and spatial databases; and unifying semistructured and conventional information types.
Read Online or Download Research Issues in Structured and Semistructured Database Programming: 7th International Workshop on Database Programming Languages, DBPL’99 Kinloch Rannoch, UK, September 1–3,1999 Revised Papers PDF
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Extra resources for Research Issues in Structured and Semistructured Database Programming: 7th International Workshop on Database Programming Languages, DBPL’99 Kinloch Rannoch, UK, September 1–3,1999 Revised Papers
Tennis Outlook Sunny Sunny Overcast Rain Rain Rain Overcast Sunny Sunny Rain Sunny Overcast Overcast Rain Temp Humidity Wind PlayTennis Hot High Weak No Hot High Strong No Hot High Weak Yes Mild High Weak Yes Cool Normal Weak Yes Cool Normal Strong Yes Cool Normal Strong No Mild High Weak No Cool Normal Weak Yes Mild Normal Weak Yes Mild Normal Strong Yes Mild High Strong Yes Hot Normal Weak Yes Mild High Strong No The algorithm known as Boosted Bayesian Classiﬁer  has proven to be the most eﬀective at this task (in fact, it was the winner of the KDD’97 data mining competition).
Leung. Complex Query Decorrelation. In ICDE 1996. D. Srivastava, K. Ross, P. Stuckey, S. Sudarshan. Foundations of Aggregation Constraints. In PPCP 1994. J. D. Ullman. Database and Knowledge-Base Systems, Vols I and II. Computer Science Press, 1989. W. Yan, P. Larson. Performing Group-By before Join. In ICDE 1994. M. Yannakakis, C. Papadimitriou. Algebraic dependencies. JCSS 252, 1982. edu Abstract. User-deﬁned aggregates (UDAs) can be the linchpin of sophisticated data mining functions and other advanced database applications, but they ﬁnd little support in current database systems.
SQL can incrementally evaluate all queries whose data complexity is in the polynomial hierarchy. That is, PHIER IESSQL. t u 24 Leonid Libkin and Limsoon Wong The best previously known 19 positive result on the limit of incremental evaluation in SQL was for a PTIME-complete query. Theorem 1 shows that the class of queries that can be incrementally evaluated in SQL is presumably much larger than the class of tractable queries. In particular, every NP-complete problem is in IESSQL. The next question is whether the containment can be replaced by equality.