Data Modeling Techniques for Data Warehousing phần 10 docx

... 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

... 73 chemical, 62, 108 postcolumn, 109 , 110 precolumn, 109 , 110 detection amperometric, 98 coulometric, 99 detector, 86 -105 conductivity, 86 diode array, 86, 90, 105 electrochemical, 86, 87, 98, 105 electroconductivity, ... pesticides. 41 Qualitative information 131 fluorescence detection, 109 fluorescence detector, 87, 95, 105 fluorescent tag, 109 folic acid, 43 folpet, 2...

Ngày tải lên: 06/08/2014, 13:22

... start with a large volume of data, even a small percentage increase can result in substantial additional data. In the first place, a data warehouse may contain too much historical data. Data ... huge amounts of data that has taken years to gather and accu- mulate. The historical data may go back 10 or even up to 20 years. Before the data arrives at the data warehouse,...

Ngày tải lên: 08/08/2014, 18:22

... V. Waugh and Margaret W. Maxfield, “Side-and-diagonal num- bers,” Mathematics Magazine 40 (1967), 74-83. 298 Warren Weaver, “Lewis Carroll and a geometrical paradox,” American Mathematical Monthly ... Mark Haiman Andrei Broder, Jim McGrath Oren Patashnik Joan Feigenbaum, Dave Helmbold Anna Karlin Oren Patashnik, Alex Schaffer Pang Chen, Stefan Sharkansky Arif Merchant, Stefan Sharkansky...

Ngày tải lên: 14/08/2014, 04:21

... 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

... the sandbox security model, strong bytecode verification and firewalls between cardlets (see also the previous section). Another interesting development in the smart card and e- commerce area ... mechanisms, 5 Security message exchange, 169 Security parameter index, 197, 203, 236 Security policy, 5 Security recovery, 8 Security services, 56 Security testing, 25152 Security...

Ngày tải lên: 14/08/2014, 18:21