data query relaxation and probabilistic databases

... User Feedback based Data Integration 25 Data/ Query Relaxation and Probabilistic Databases 25 2.4.1 Database Relaxation 25 2.4.2 Query Relaxation ... of our approach 2.4 Data/ Query Relaxation and Probabilistic Databases 2.4.1 Database Relaxation Some effort have been performed to relax the strict schema defined in relational databases, Such efforts ... databases, and aim to bring semantic flexibility to relational databases 27 CHAPTER LITERATURE REVIEW 2.4.3 Probabilistic Databases There also exists a large body of works over probabilistic databases, ...

Ngày tải lên: 10/09/2015, 09:09

... This program and its RA equivalent defines the two queries pUq and coalscp, the first on P and Q and the second on P only We will refer to them as the coalesce query and the until query, and observe ... [14] J Han, Y Fu, W Wang, K Koperski, and O R Zaiane DMQL: A data mining query language for relational databases In Workshop on Research Issues on Data Mining and Knowledge Discovery (DMKD), pages ... such as blocking operators, data model, and query power that are most significant for this paper The Tapestry project was the first to model data streams as append-only databases supporting continuous...

Ngày tải lên: 23/03/2014, 12:20

... Dang Tran Khanh Query assurance for outsourced databases: state-of-the-art  [2] Tran Khanh Dang Ensuring correctness, completeness, and freshness for Outsourced Tree-Indexed Data Information ... Authentication Data Structure)  Xác Suất  Demo Môn An Toàn Bảo Mật Hệ Thống Thông Tin Dịch vụ Outsourcing Database  Thông thường, CSDL quản lý tổ chức sở hữu chúng (in-house database)  Tốn ... Nội Dung  Dịch vụ Outsourcing Database  Đảm bảo tính bảo mật cho Outsourced Database  Đảm bảo kết cho việc truy vấn Outsourced Database  Một số phương pháp  Chữ ký điện tử...

Ngày tải lên: 29/01/2015, 11:27

... providers host owners’ databases and offer seamless mechanisms to create, store, update and access (query) their databases This model introduces several research issues related to data security In ... especially my parents, and my husband, Xu Le, for their support and encouragement during the past few years vi vii Summary In Outsourced Database model, data owners publish their data management requests ... adequate software, hardware and network resources to host data owner’s databases as well as mechanisms for the client to efficiently create, update and access the outsourced data This model is applicable...

Ngày tải lên: 13/10/2015, 15:54

... Examine data needed  Ascertain data availability  Determine data frequency  Decide the refresh cycle Types of Warehouse Data    Fact data - Measures Dimension data - Query drivers Summary data ... between an enterprise-wide data warehouse and localized data marts Recognize the difference between independent and dependent data marts Identify the data that is stored in a data warehouse Explain ... of data by examining where and why it is used List the data models that may already exist in a company and describe where they may be useful to the warehouse model Explain the two common data...

Ngày tải lên: 25/04/2013, 20:33

... Chapter Collecting Data — The Class and the Array In This Chapter ᮣ Introducing the C# class ᮣ Storing data in an object ᮣ Assigning and using object references ᮣ Creating and building arrays ... Collecting Data — The Class and the Array The code for the VehicleDataOnly program is as follows: // VehicleDataOnly - create a Vehicle object, populate its // members from the keyboard and then ... dTopSpeed, nWeight, and bClunker I address the stop and go parts in Chapters and Because the class is so central to C# programming, the chapters in Part IV of this book spelunk the ins and outs of classes...

Ngày tải lên: 04/10/2013, 21:20

... communicate with a data source • Command: Needed to perform actions such as selecting, updating, and deleting data from a data source • DataReader: Needed to read data from a data source, one record ... of Command are to take the SQL query from the client and pass it to the data source and make a call to ExecuteReader() to open the data reader stream for the DataReader object Finally, a DataReader ... the job of gathering the data from a data source and temporarily holding it inside the dataset to be used by the report rendering engine Although we’ll create datasets and data tables manually,...

Ngày tải lên: 05/10/2013, 08:48

... Broker-controlled databases Primary database Instances 3-6 Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database ... the standby databases to replace the primary database and take over production processing • Helps you logically define and create a Data Guard configuration consisting of a primary database and ... and managing standby databases • Command-line interface (CLI): – Started by entering DGMGRL at the command prompt where the Oracle server is installed – Enables you to control and monitor a Data...

Ngày tải lên: 26/10/2013, 20:15

... Physical and Logical Standby Databases s New Features Specific to Physical Standby Databases s New Features Specific to Logical Standby Databases New Features Common to Physical and Logical Standby Databases ... primary and standby databases, minimizing the downtime of the primary database for planned and unplanned outages s Complete data protection With standby databases, Data Guard guarantees no data ... physical standby database See Also: Chapter 13, "SQL Statements Relevant to Data Guard" and the Oracle Database SQL Reference New Features Specific to Logical Standby Databases Logical standby databases, ...

Ngày tải lên: 26/10/2013, 22:15

... some red and some green candies has a total of 60 candies in it The ratio of the number of green to red candies is 7:8 How many of each color are there in the bag? The sum of a number x and four ... 15x 60 ᎏ ᎏ = ᎏᎏ 15 15 x=4 Therefore, there are 7x = (7)(4) = 28 green candies and 8x = (8)(4) = 32 red candies Mean, Median, and Mode Examples Max is three years older than Ricky Unknown = Ricky’s ... remaining event by adding the known probabilities together and subtracting their total from – DATA ANALYSIS, STATISTICS, AND PROBABILITY – Graphs and Tables Inc rea se se rea Inc se a re Circle graphs...

Ngày tải lên: 02/11/2013, 17:20

... for this database and then add the size of the model database All new databases are based on the model database The model database has an initial size of MB A quick estimate of the user data of ... that uses SQL_DMO to extract the data from the database and transform the data into standard electronic data interchange (EDI) files Answer: A Explanation: The data will be published at the company’s ... the database design and the benefits are faster query response time and removal of redundant data Another less theoretical line of thought is the realization that the OrderID, ProductID and Quantity...

Ngày tải lên: 04/11/2013, 16:15

... in the data stream case because of the huge volume of the underlying data Chapter 11 explores the problem of indexing and querying data streams Dimensionality Reduction and Forecasting in Data ... Synopsis Constructionin Data Streams The large volume of data streams poses unique space and time constraints on the computation process Many query processing, database operations, and mining algorithms ... students and researchers It is hoped that this book will provide a reference to students, researchers and practitioners in both introducing the topic of data streams and understanding the practical and...

Ngày tải lên: 08/11/2013, 02:15

... both hardware and software technologies, automated data generation and storagehas become faster than ever Such data is referred to as data streams Streaming data is ubiquitous today and it is often ... of data streams We can categorize these solutions as data- based and task-based ones In data- based solutions, the idea is to examine only a subset of the whole data set or to transform the data ... clusters The data points of each synthetic dataset will follow a series of Gaussian distributions, and to reflect the evolution of the stream data over time, we change the mean and variance of...

Ngày tải lên: 08/11/2013, 02:15

... Demand Classification of Data Streams, Proc 2004 Int Con$ on Knowledge Discovery and Data Mining (KDD '04), Seattle, WA [4] Babcock B., Babu S., Datar M., Motwani R., and Widom J (2002) Models and ... High-speed Data Streams, Proceedings o the Ninth International f Conference on Knowledge Discovery and Data Mining [16] Garofalakis M., Gehrke J., Rastogi R (2002) Querying and mining data streams: ... different types of datasets, includingunstructured ones, such as transaction and text datasets, semi-structured ones, such as XML datasets, and structured ones, such as graph datasets The patterns...

Ngày tải lên: 08/11/2013, 02:15

... watermark 94 DATA STREAMS: MODELS AND ALGORITHMS spatial locations in the data at which the data is being reduced, those at which the data is increasing, and those from where the data is shifting ... Kawasoe, and Setsuo Arikawa Online algorithms for mining semi-structured data stream In ICDM, pages 27-34,2002 [4] B Babcock, S Babu, M Datar, R Motwani, and J Widom Models and f Issues in Data Stream ... conference on Knowledge discovery and data mining, pages 462-468,2002 [lo] D Cheung, J Han, V NG, and C Wong Maintenance of discovered association rules in large databases : an incremental updating...

Ngày tải lên: 15/12/2013, 13:15

... processing and mining in data cubes, and management and mining o stream data We briefly review previous f research in these areas and point out the differences from our work In data warehousing and ... management and querying of stream data ([8, 17, 18, 16]), and data mining (classification and clustering) on stream data ([22, 19, 25, 29, 2, 15, 3, 41) Although such studies lead to deep insight and ... the form of stream data and studies OLAP and mining over partially materialized stream data cubes Our data structure, to certain extent, extend the previous work on H-tree and Hcubing ([20])...

Ngày tải lên: 15/12/2013, 13:15

... over data streams Data elements arrive on multiple data streams, and the system examines each data item as it arrives and attempts to assign it to one of a finite set of classes using a data ... Conference on Data Engineering, March 2003 [8] R Motwani, J Widom, A Arasu, B Babcock, S Babu, M Datar, G Manku, C Olston, J Rosenstein, and R Varma Query processing, approximation, and resource ... assumption that, in certain data- stream processing applications, recent data is more useful and pertinent than older data In such cases, we would like to answer questions about the data only over the...

Ngày tải lên: 15/12/2013, 13:15

... Introduction Data streams pose a unique challenge to many database and data mining applications because of the computational and storage costs associated with the large volume of the data stream ... dimensional stream of data points Many problems in the data stream scenario are inherently multidimensional, and may in fact involve hundreds or thousands of independent and simultaneous data streams ... construction, and their application to a variety of data mining and database problems This chapter is organized as follows In the next section, we will discuss the sampling method and its application...

Ngày tải lên: 15/12/2013, 13:15

... Data Streams VLDB Conference [2] Aggarwal C, Han J., Wang J., Yu P (2004) On-Demand Classification of Data Streams ACM KDD Conference [3] Aggarwal C (2006) On Futuristic Query Processing in Data ... remove this watermark 204 DATA STREAMS: MODELS AND ALGORITHMS [31] Flajolet P., Martin G N (1985) Probabilistic Counting for Database Applications Journal of Computer and System Sciences, 31(2) ... Wavelet Synopses for Data Streams: Minimizing Non-Euclidean Error ACM KDD Conference [56] Guha S., Koudas N (2002) Approximating a Data Stream for Querying and Estimation: Algorithms and Performance...

Ngày tải lên: 15/12/2013, 13:15

... problems and recent advances in join processing for data streams Stream processing is a young and exciting research area, yet it also has roots in and connections to well-established areas in databases ... this watermark 249 Indexing and Querying Data Streams partitioned into three sub-windows wo = 2, w = 8, and w = 16 Figure 1.7 shows the decomposition of the query and the composition of the aggregate ... sequences x and y is computed using the L2 distance between and $ as - L; (2,$)/2 lease purchase PDF Split-Merge on www.verypdf.com to remove this watermark Indexing and Querying Data Streams query...

Ngày tải lên: 15/12/2013, 13:15