By Dimitri Theodoratos, Timos Sellis (auth.), Mukesh Mohania, A Min Tjoa (eds.)

This booklet constitutes the refereed lawsuits of the 1st foreign convention on info Warehousing and data Discovery, DaWaK'99, held in Florence, Italy in August/September 1999. The 31 revised complete papers and 9 brief papers awarded have been conscientiously reviewed and chosen from 88 submissions. The ebook is split in topical sections on information warehouse layout; on-line analytical processing; view synthesis, choice, and optimization; multidimensional databases; wisdom discovery; organization principles; inexing and item similarities; generalized organization ideas and knowledge and net mining; time sequence facts bases; facts mining purposes and knowledge analysis.

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Extra resources for DataWarehousing and Knowledge Discovery: First International Conference, DaWaK’99 Florence, Italy, August 30 – September 1, 1999 Proceedings

Example text

Finally, monitor module checks the update message. If monitor finds any update, it will notify the integrator (Figure 2(d)). Fig. 3. Periodically Update Detection in Oracle Fig. 4. Query Arrived at Wrapper Periodically U p d a t e Detection Every update will be stored in a table before it is sent (Figure 3(a)). At the predetermined time, monitor sends the updates to the integrator (Figure 3(b)) and cleans the table (Figure 3(c)). Then, when another update applied on the relation (Figure 3(d)), the update will be recorded in the table (Figure 3(e)).

Li, and K. Karlapalem [VLK98] Vivekanand Gopalkrishnan, Qing Li, Kamalakar Karlapalem, „Issues of ObjectRelational View Design in Data Warehousing Environment“, IEEE SMC Conference 1998, pp. 2732-2737. Phil. thesis, HKUST, 1998. Appendix Sample query Q: Total Sales of Products in {P_SET}, to Teenagers, group by Product, by Year. Assumptions • {P_SET} contains 50% of all Products. • 80% of Sales to Teenagers consist of Products in {P_SET}. • 20% of Customers are Teenagers. Table B. Disk I/ O cost for Q Table A.

Star Schema Processing for Complex Queries“, White paper 1997. [SLT91] Marc H. Scholl, Christian Laasch, Markus Tresch, „Updatable Views in ObjectOriented Databases“, DOOD 1991, pp. 189-207. 22 V. Gopalkrishnan, Q. Li, and K. Karlapalem [VLK98] Vivekanand Gopalkrishnan, Qing Li, Kamalakar Karlapalem, „Issues of ObjectRelational View Design in Data Warehousing Environment“, IEEE SMC Conference 1998, pp. 2732-2737. Phil. thesis, HKUST, 1998. Appendix Sample query Q: Total Sales of Products in {P_SET}, to Teenagers, group by Product, by Year.

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