relational data model ppt

... Activity 4.2: Creating a Logical Data Model In this activity, you will use the skills learned in this module to define the relationships within a logical data model and produce a sample ER diagram ... Activity 4.2: Creating a Logical Data Model 19 Exercise 2: Determining Cardinality and Existence In this exercise, you will ... activity, you will be able to: ! Identify relationships between entities. ! Create a logical data model. Before You Begin This activity will take place in small groups with a class discussion...

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... fusion 35 TIA-942 Data Center Standard TIA TIA - - 942 942 - - Telecommunications Infrastructure Telecommunications Infrastructure Standard for Data Centers Standard for Data Centers ã Site ... Lighting Manufacturing 39 Main Distribution Area ã Fiber intensive area of Data Center, combines data from all sources within data center and combines them onto a small number of high capacity fibers ... Regulations are driving high levels of data storage ã The largest risk to the network are the devices at the periphery 23 Proper Cooling Techniques Proper Data Center Design deployment of Hot...

Ngày tải lên: 10/12/2013, 03:15

... Introduction to Telecommunications, Winter 2000 Lecture 14 Communication Basics Part-2 Digital Data Signal: Bit rate, is the number of bits transmitted per second. Baud rate, is the signaling ... Theorem: Mathematical guidelines have been established to determine the maximum theoretical data transfer over a channel based on the channel's bandwidth and Signal-to-Noise ratio. This ... fundamental laws used in telecommunications is Shanon's law. In 1948 Shanon proved that the maximum data rate of a noisy channel whose bandwidth is B Hz, and whose signal-to-noise ratio is S/N, is...

Ngày tải lên: 10/12/2013, 08:15

... model supports. The relational database is the standard database supported by the Data Modeling UML profile. An object relational database, an extension of the relational database, is also supported ... complete development of relational and object relational databases 1 from business requirements through the physical data model. However, modeling of the physical data model must express a detailed ... traditional data modeling as well as some familiarity with the UML. Database The Database is the system for data storage and controlled access to stored data. It is the biggest element a data model...

Ngày tải lên: 10/12/2013, 15:15

... Using the Word Object Model 65 Lab B: Adding an Outlook Bar Group and Outlook Bar Shortcuts 69 Review 73 Module 7: Working with the Microsoft Outlook 2000 Object Model 34 Module 7: ... Object Model Returning the COMAddIns Collection Use the read-only COMAddIns property of the Application object to return the COMAddIns collection, which represents all the Component Object Model ... time. The only object you can create in the Outlook object model is the Application object. This object resides at the top of the object model. Using the Application Object from Within a Form...

Ngày tải lên: 10/12/2013, 16:15

Ngày tải lên: 11/12/2013, 13:15

... populating a DataTable object with the rows retrieved from the database: the Fill method which expects an existing DataTable or DataSet as a parameter which is filled with the data, and the GetData ... class called DataTable1TableAdapter, and a corresponding DataTable class called DataTable1, appear in the DataSet Designer window. 15. In the DataSet Designer window, click the DataTable1 item. ... click the DataSource property. This property identifies the DataSet object that the BindingSource uses to connect to the database; notice that it refers to northwindDataSet. 7. Click the DataMember...

Ngày tải lên: 15/12/2013, 00:15

... cảm mà không cần bào chữa  Bước 5: Tổng kết và kết thúc buổi làm việc Six Thinking Hats Model Six Thinking Hats (Tạm Dịch: Lục Mạo Tư Duy) Six Thinking Hats - Là một kĩ thuật được...

Ngày tải lên: 15/12/2013, 14:15

... VPN. Growing Needs Limitations in the data center infrastructure could have stifled NEXTLINK’s growth. However, Paul Jasina, NEXTLINK’s senior manager of data center communica- tions, with over ... five years tenure, proved to be skillful at managing the data center’s infrastruc- ture performance. Five years ago, faced with the data center challenges of increased perfor- mance, higher availability, ... Technology Planning for Change at the Speed of Technology How a National ISP is Building the Data Centers of Tomorrow Data networking engineer Robert Wynn works on a KRONE Ultim8™ block. NEXTLINK uses...

Ngày tải lên: 20/12/2013, 22:15

... BLANK 78 Activity 9.5: Identifying Data Storage Requirements Exercise 1: Identifying a Data Storage Method for a Scenario (10 minutes) ! Identify data storage requirements 1. Participate ... use is paramount. B A 200-user data entry system. A high data- entry rate is required. Solution A B Activity 9.5: Identifying Data Storage Requirements 79 ... in small groups as assigned by the instructor. 2. Read each scenario below. 3. Identify which data storage technology best meet the needs described in the scenario. 4. Write your answers below....

Ngày tải lên: 21/12/2013, 06:16

... through views. The data dictionary holds all the data about the database. Write a SELECT statement to display the contents of the data dictionary views. Frequently Accessed Data Dictionary Views D DICTIONARY D DICT_COLUMNS D USER_OBJECTS D USER_CONSTRAINTS D USER_CONS_COLUMNS ... the Oracle7 Server because the database relies on the data dictionary to record and verify information about itself. Oracle Data Dictionary 10Ć17 Summary The data dictionary is a set of tables ... Builder10Ć20 Oracle Data Dictionary 10Ć5 Overview The Oracle data dictionary is one of the most important components of the Oracle7 Server. It is created when a database is created. Whenever the database...

Ngày tải lên: 21/12/2013, 06:17

... a Conceptual Design for Data Requirements Module 8: Designing Data Services Module 9: Data Storage Considerations Designing Data Services and Data Models Overview of Data Services Accessing Host-Based Systems Accessing ... Conceptual Design for Data Requirements Module 8: Designing Data Services Module 9: Data Storage Considerations Designing Data Services and Data Models In the next module, you will learn about data storage. ... was primarily developed for access to relational data stores. Although additional drivers exist for nonrelational data stores, performance of nonrelational data stores might not be adequate. "...

Ngày tải lên: 21/12/2013, 06:18

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Ngày tải lên: 21/12/2013, 07:17

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