Data Modeling Techniques for Data Warehousing phần 4 pdf

... models will not do. Chapter 2. Data Warehousing 7 8 Data Modeling Techniques for Data Warehousing 22 Data Modeling Techniques for Data Warehousing Tables 1. Dimensions, Measures, and Related ... xii Data Modeling Techniques for Data Warehousing Chapter 9, “Selecting a Modeling Tool” on page 155, an overview of the functions that a data mo...

Ngày tải lên: 18/07/2014, 17:54

... copy ■ 4. 6 The Object Root Class 75 42 43 Console.WriteLine("sc1.ToString = {0}", sc1.ToString()); 44 Console.WriteLine("sc2.ToString = {0}", sc2.ToString()); 45 46 DeepCopy ... correct) but 64 Chapter 4: Unified Type System ■ 4. 4 Conversions In developing C# applications, it may be necessary to convert or cast an expression of one type into that of another....

Ngày tải lên: 05/08/2014, 10:20

... deuterium. The DIII-D, at General Atomics, and the Alcator C-Mod, at MIT, are currently the largest tokamaks operating in the U.S. TFTR and DIII-D are shown in Figure 44 . Fig. 41 . Fig. 42 . 10 1Energy Options ... Nuclear. In the U.S. in 2001 net primary energy con- sumption was 97 quadrillion BTU s (quads). Of this Fig. 37. 9 7Energy Options for the Future Despite...

Ngày tải lên: 08/08/2014, 15:21

... GETTING STARTED WITH MYSQL 39 4. Type: \q; then press ENTER. This closes your MySQL database connection. You are now logged out of the MySQL server: the mysql& gt; prompt is ... GETTING STARTED WITH MYSQL 41 Giving MySQL commands to a Web server MySQL s client/server arrangement makes it well-suited to Web applications. With MySQL server run...

Ngày tải lên: 08/08/2014, 22:20

Ngày tải lên: 09/08/2014, 12:22

... by 6 Data Modeling Techniques for Data Warehousing viii Data Modeling Techniques for Data Warehousing calling a totally new approach to data modeling. It is called dimensional data modeling, ... . . 15 0 8.4.4.5 Selecting a Data Warehouse Modeling Approach 15 1 Considerations for ER Modeling 15 2 Considerations for Dimensional Modeling 15 2...

Ngày tải lên: 14/08/2014, 06:22

... assigned to the modeling task rather than performing their standard business duties. Chapter 5. Architecting the Data 27 22 Data Modeling Techniques for Data Warehousing 4 .2. 3 A Combined Approach As ... maintain historical data while reconciling the data. Thus, we can say reconciled data is a special type of derived data. 24 Data Modeling Techniques for...

Ngày tải lên: 14/08/2014, 06:22

... key . Chapter 6. Data Modeling for a Data Warehouse 37 Chapter 6. Data Modeling for a Data Warehouse This chapter provides you with a basic understanding of data modeling, specifically for the purpose ... dimension table as a 46 Data Modeling Techniques for Data Warehousing 6 .3 ER Modeling A prerequisite for reading this book is a basic knowledge o...

Ngày tải lên: 14/08/2014, 06:22

... with the execution of the data warehousing processes. 50 Data Modeling Techniques for Data Warehousing Figure 24. Dimensions of CelDial Required for the Case Study 7 .4. 2.3 Creating Facts Together, ... Fact 2 and Fact 3 62 Data Modeling Techniques for Data Warehousing For a discussion on selection of a modeling technique, refer to Chapter 8, Data Wareho...

Ngày tải lên: 14/08/2014, 06:22

... simply adding more metadata. 72 Data Modeling Techniques for Data Warehousing 8.2 Principal Data Warehouse Modeling Techniques Listed below are the principal modeling techniques (beyond what ... to data warehouse modeling. 8.1 Data Warehouse Modeling and OLTP Database Modeling Before studying data warehouse modeling techniques, it is worthwhile investiga...

Ngày tải lên: 14/08/2014, 06:22

... or find a solution for their problems as well as on the type of data warehouse application that is being considered for the modeling project. 94 Data Modeling Techniques for Data Warehousing Figure ... clearly. The user should be informed, through the business metadata, which sets of determinant dimension keys are available for each fact. 108 Data Modeling Techniq...

Ngày tải lên: 14/08/2014, 06:22

... source data item. You may also have to deal with complex derivation formulas, involving several source data items, functional 112 Data Modeling Techniques for Data Warehousing Figure 72 . The ... page 115. 114 Data Modeling Techniques for Data Warehousing The Time Dimension: Because a data warehouse is an integrated collection of historical data, the abilit...

Ngày tải lên: 14/08/2014, 06:22

... attributes. Chapter 8. Data Warehouse Modeling Techniques 145 temporal modeling for producing the historical data model for the data warehouse. Successful data warehouse modeling requires that the techniques be ... such modeling techniques may turn out to be required for a particular project, complexity for end users can be reduced by building a front-end data...

Ngày tải lên: 14/08/2014, 06:22

... the complete database or incrementally generate parts of the database. 156 Data Modeling Techniques for Data Warehousing 9. 6 Reporting Reporting is an important function of the data modeling tool ... Figure 92 . Subset of CelDial Corporate ER Model 168 Data Modeling Techniques for Data Warehousing Information Engineering, and Zachman notation. An efficient a...

Ngày tải lên: 14/08/2014, 06:22

... 147 transform 161 triggers 160 two-tiered data modeling 91, 152 V volatility class 146 W WSDDM 25 Index 197 194 Data Modeling Techniques for Data Warehousing SG24-2238-00 Printed in the U.S.A. Data ... apply) (+45) 4 810- 1320 - Danish (+45) 4 810- 1420 - Dutch (+45) 4 810- 1540 - English (+45) 4 810- 1670 - Finnish (+45) 4 810- 1220 - French (+45) 4 810- 1020 - German (+...

Ngày tải lên: 14/08/2014, 06:22