DATA MODELING FUNDAMENTALS (P1) ppt

... Modeling Principles / 34 Data Modeling Approaches and Trends / 35 Data Modeling Approaches / 36 Modeling for Data Warehouse / 38 vii DATA MODELING FUNDAMENTALS DATA MODELING FUNDAMENTALS A Practical ... INTRODUCTION TO DATA MODELING 1 1 Data Modeling: An Overview 3 Chapter Objectives / 3 Data Model Defined / 4 What Is a Data Model? / 5 Why Data Modeling?...

Ngày tải lên: 07/07/2014, 09:20

... a logical data model. In our case, the relational data model is the logical data model. Note the following major components of a conceptual data model and a relational data model. E-R Data Model Entity ... DETAIL CHAPTER SUMMARY . Data models created at the four information levels in an organization: external data model, conceptual data model, logical data model, and physi...

Ngày tải lên: 07/07/2014, 09:20

... in a data model. We reviewed key attributes in sufficient depth. During the data modeling process, at each stage, you need to check the data model for completeness and correctness. Data modeling ... attributes of the business object ORDER. So, the data values you find stored in the database are values of the attributes of the 157 Data Modeling Fundamentals. By Paulraj Ponniah...

Ngày tải lên: 07/07/2014, 09:20

... evolving data model. 400 CHAPTER 12 DATA MODELING: PRACTICAL TIPS GLOSSARY Aggregation Entity Type. Represents a three-way, four-way, or a higher degree relationship. Agile Modeling. Data Modeling ... specific par ts of the data models by individual sites if this is feasible. ITERATIVE MODELING Iterative modeling and incremental modeling go hand-in-hand. You break up the mod...

Ngày tải lên: 07/07/2014, 09:20

... Questions 3. Network and User Data 3.1. 3.2. The Network Data The Physical Layer Data 3.2.1. 3.2.2. 3.2.3. 3.2.4. 3.2.5. 3.2.6. 3.2.7. 3.2.8. Sequence of Events and Definitions Modulation of data and signals Digital ... Chapter 3 discusses data in most of its forms, from analog form to characters and as data exists within the network (baseband signal, passband modulated signal, to...

Ngày tải lên: 22/12/2013, 20:17

... 106 (m2/sec) 0.181 0.149 0.126 0.177 0.171 0.496 0.449 0.121 1.422 0.400 0.156 0.181 3.219 1.018 fl Adapted from F. P. Incropera and D. P. Dewitt, Fundamentals of Heat Transfer. © 1981 John Wiley & Sons, Inc. Reprinted by permission. Description ... 297 97.1 117 127 23.1 24.1 87.6 53.7 23.0 25.1 89.2 174 40.1 9.32 68.3 41.8 237 401 317 80.2 35.3 156 138 90.7 71.6 148 4...

Ngày tải lên: 23/01/2014, 07:20

... SERVER 2000 DATA TRANSFORMATION SERVICES 4 Using DTS to Move Data into a Data Mart 77 Multidimensional Data Modeling 78 Differences Between Relational Modeling and Multidimensional Modeling 80 The ... 36 Upgrading a Database from Microsoft Access to SQL Server 36 Consolidating Data from Multiple Sources 36 Initial and Periodic Loading of a Data Mart or a Data Warehouse 3...

Ngày tải lên: 26/01/2014, 15:20

... an external data model. INFORMATION LEVELS 13 storage. So, who performs data modeling? Data modeling specialists with appropriate training, knowledge, and skills do the work of data modeling. However, ... ideas with particular emphasis on data modeling. Where does data modeling fit in the whole process? What purposes does it serve and what is its significance? Data modeli...

Ngày tải lên: 07/07/2014, 09:20

... of data models: external data model, conceptual data model, logical data model, and physical data model. We also reasoned out the need for these four types of data models. The four types of data ... group. Logical Data Model. The logical data model brings data modeling closer to implemen- tation. Here the type of database system to be implemented has a bearing on the con...

Ngày tải lên: 07/07/2014, 09:20

... relationship, in a conceptual data model diagram you can show these two entity types and mark their relationship as many-to-many. In a data model at the con- ceptual data model, expressing many-to-many ... time-dependent data elements and that your data model must include historical entity types to keep track of the changes. Figure 4-29 indicates how historical entity types are incl...

Ngày tải lên: 07/07/2014, 09:20