plan and create databas

... who creates a database object such as a table, index, view, trigger, etc, is the database object owner for that database object. Permission to create database objects must be given by the database ... used to analyze queries and determine which indexes should be created on a table and to select and create an optimal set of indexes and statistics for a SQL Server 2000 database without requiring ... We calculate the specifics 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 1 MB....

Ngày tải lên: 04/11/2013, 16:15

... low in MHz, and high in acid. You create an energy deficit and an alkaline deficit! Oh oh… look out, here comes dis-ease. How to Free Yourself of ANY Disease, Stop Fatigue, And Create Unstoppable ... to live and expand. In order to get rid of the rats, you must clean the trash first. In order to be completely healthy, vibrant and energetic you must clean the trash in your body, and create ... what I promise for you, then simply email me and I will issue a prompt and courteous refund – no questions asked – and you may still keep the package and all the bonuses at no cost to you. Click...

Ngày tải lên: 07/11/2013, 21:15

... OleDbConnection(connectionString); // create an OleDbCommand object OleDbCommand myOleDbCommand = myOleDbConnection.CreateCommand(); // set the CommandText property of the OleDbCommand object to // a ... OleDbConnection(connectionString); // create an OleDbCommand object OleDbCommand myOleDbCommand = myOleDbConnection.CreateCommand(); // set the CommandText property of the OleDbCommand object to // a ... Northwind Access database using an OleDbConnection object and retrieve a row from the Customers table. Notice that you use an OleDbCommand and OleDbDataReader object to run a SQL statement and read...

Ngày tải lên: 24/12/2013, 01:17

... These include data warehousing and online analytic processing (OLAP) applications, data mining, genome databases, and multiple media databases manipulating unstructured and semistructured data. Therefore, it ... first join attribute exists in Table 1 and Table 2, and the second join attribute exists in Table 2 and Table 3, and the last join attribute exists in Table 3 and Table 4. Therefore, these join operations ... general architecture of databases working in a Grid envi- ronment. The Grid database architecture typically works in a wide area, spanning multiple institutions, and has autonomous and heterogeneous...

Ngày tải lên: 21/01/2014, 18:20

... strengths and weaknesses of the following parallel database architectures: ž Shared-everything ž Shared-nothing ž Shared-something 1.9. Describe the relationship between parallel databases and Grid databases. 1.10. ... Skew is an important factor in paral- lel database query processing. Therefore, understanding skew modeling is a critical part of understanding parallel database query processing. In Section 2.4, ... any given time, that is, the High-Performance Parallel Database Processing and Grid Databases, by David Taniar, Clement Leung, Wenny Rahayu, and Sushant Goel Copyright  2008 John Wiley & Sons,...

Ngày tải lên: 21/01/2014, 18:20

... Iyer and Dias (ICDE 1990) and DeWitt et al. (1992) discuss systems issues in parallel database sorting. Parallel sorting for databases uses external sorting methods. Yamane and Take (1987) and ... the normalization process. High-Performance Parallel Database Processing and Grid Databases, by David Taniar, Clement Leung, Wenny Rahayu, and Sushant Goel Copyright  2008 John Wiley & Sons, ... be different, and after the buckets are cre- ated bucket placement and arrangement are performed to make the workload of the three processors balanced. For example, buckets A; B,andG go to processor 1,...

Ngày tải lên: 21/01/2014, 18:20

... the join query result and the product of the two tables R and S. For example, if there are 100 and 200 records from table R and table S, respectively, and the join between R and S produces 50 records, ... ratios σ R and σ j . 6.6. Explain the main difference between equations 6.7 and 6.12 in terms of the selectivity ratio σ R in equation 6.7 and σ R1 in equation 6.12. 6.7. Explain the similarity and ... factor and thus the scheme will simplify algorithm design and implementation. 6.8 BIBLIOGRAPHICAL NOTES Group-by and aggregate functions are tightly related. Early work on aggregate functions and...

Ngày tải lên: 21/01/2014, 18:20

... both operands are the same they do not satisfy the predicate, and hence return a false result. The dif- ference between subset and sublist originated from the basic difference between sets and lists. ... table and a foreign key (FK) on the other table. Primary keys are normally indexed to prevent duplicate values that exist in that table. PK-FK join is common in relational databases because a database is ... processors, and FRI-1 replicates the whole index. Since extra benefits of PRI-1 and FRI-1 are not obvious, at least in parallel one-index search query processing, maintaining global index as in PRI-1 and...

Ngày tải lên: 21/01/2014, 18:20

... buckets: 11, 13, 22, 23, 32 and 33, and 3 processors), load balancing is achieved by spreading and combining partitions to create more equal loads. For example, buckets 11, 22 and 23 are placed at processor ... not be included in plan correction and only a small part of the query plan is likely to be corrected. On the other hand, we might choose to correct a large portion of the query plan hoping to obtain ... access plan, whereas execution scheduling is for incor- porating parallelism scheduling into the query access plans. Parallelization models High-Performance Parallel Database Processing and Grid Databases, by...

Ngày tải lên: 21/01/2014, 18:20

... main differences between distributed databases and multidatabase systems. 10.3. Discuss the suitability of parallel databases, distributed databases, and multidatabase systems in the Grids. 10.4. ... top-down approach in Grid databases and a bottom-up approach in distributed databases. 10.8. Compare and contrast two-phase commit (2PC) and three-phase commit (3PC) in a homogenous distributed database system. 10.9. ... www.verypdf.com to remove this watermark. 10.2 Distributed Database Systems and Multidatabase Systems 295 T 1 T 2 T n LDB–Local Database LDBMS–Local Database Management Systems –Distributed DBMS boundary T 1 ,...

Ngày tải lên: 21/01/2014, 18:20

... homogeneous and synchronous distributed database sys- tems cannot be implemented in Grid databases because of architectural lim- itations (Grid databases are heterogeneous and asynchronous). (2) Multidatabase ... (distributed and multi- database), and the recovery model for DBMS without global information (Grid database). Figure 12.8 shows the recovery model for an individual database site. The stable database ... protocol, and explain how it solves the concurrency issues in the Grid. 11.5. Compare and contrast the difference between GCC and any other concurrency control protocols (e.g., distributed databases and...

Ngày tải lên: 21/01/2014, 18:20

... clustering, outliers, etc. However, this book focuses on database and database processing and considers data mining processes from a database processing perspective. It covers commonly used data ... parallel data mining (Chapters 16 and 17) is twofold: High-Performance Parallel Database Processing and Grid Databases, by David Taniar, Clement Leung, Wenny Rahayu, and Sushant Goel Copyright  2008 ... in the Grid database: (1) The Grid database handles comparatively larger volumes of data than tradi- tional distributed databases. The nature of the transactions is long-running, and hence aborts...

Ngày tải lên: 21/01/2014, 18:20

... candidate generation. The table gives fre- quent 3-sequences, and we would like to use the joining and pruning to create candidate 4-sequences. By joining the first sequence <(1 2) (3)> and ... Outline the main differences between: a. Querying and association rules, b. Querying and sequential patterns, c. Querying and clustering, and d. Querying and classification. Use examples to highlight ... of these candidate itemsets, and prunes all infrequent candidate 2-itemsets. Ž In the third iteration, it again joins each of the frequent 2-itemsets and generates the following potential candidate...

Ngày tải lên: 21/01/2014, 18:20

... Benchmark Handbook for Database and Transaction Systems, Second edition, Morgan Kaufmann, 1993. Hameurlain, A. and Morvan, F., “A Cost Evaluator for Parallel Database Systems”, Pro- ceedings of Database ... Relational Database Systems: Why, How and Beyond”, Proceedings of Database and Expert Systems Applications (DEXA), pp. 302–312, 1996. Haran, B., et al., “Prototyping Bubba, A Highly Parallel Database ... Speedup and Scaleup on Large Databases”, Proceedings of Measurement and Modeling of Computer Systems (SIGMETRICS), pp. 245–246, 1990. Ganguly, S., Goel, A., and Silberschatz, A., “Efficient and Acurate...

Ngày tải lên: 26/01/2014, 15:20

... 2002. Deloch, S., “Databases, Web Services, and Grid Computing—Standards and Directions”, Proceedings of Euro-Par, pp. 3, 2003. Koparanova, M.G. and Risch, T., “High-Performance GRID Stream Database Manager ... Talia, D., and Trunfio, P., “Parallel and Grid-Based Data Mining - Algo- rithms, Models and Systems for High-Performance KDD”, Proceedings of the Data Mining and Knowledge Discovery Handbook, pp. ... Control and Data Replication Strategies for Large-scale and Wide-distributed Databases”, Proceedings of Database Systems for Advanced Applications (DASFAA), 2001. Vazhkudai, S., Tuecke, S., and Foster,...

Ngày tải lên: 26/01/2014, 15:20

Ngày tải lên: 26/01/2014, 15:20

Ngày tải lên: 14/02/2014, 13:20

Ngày tải lên: 17/02/2014, 06:20

Ngày tải lên: 17/02/2014, 22:20

Ngày tải lên: 19/02/2014, 12:20