relational data model pdf

Ngày tải lên: 12/05/2014, 11:55

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Ngày tải lên: 09/08/2014, 18:21

Ngày tải lên: 09/08/2014, 18:22

... value-added data services requires innovative offerings, a competitive price, and superior reliability and availability. Extending native Ethernet across the LAN, WAN, and MAN opens the door for new data...

Ngày tải lên: 10/12/2013, 03:15

... 0RGXOH#6=#3URFHVV#0RGHO##6²8 /HVVRQ#4=#3URFHVV#0RGHO#IRU#,QIUDVWUXFWXUH#'HSOR\PHQW Lesson 1: Process Model for Infrastructure Deployment A high-level overview of the MSF process model for infrastructure deployment 0RGXOH#6=#3URFHVV#0RGHO##6²4< 3URMHFW#7UDGH0RII#0DWUL[ &RQVWUDLQ2SWLPL]H ... 0RGXOH#6=#3URFHVV#0RGHO##6²6 2EMHFWLYHV At the end of this module, you will be able to „ Understand the process model for infrastructure deployment at a high level „ Understand the benefits of versioned releases „ Understand ... to deliver the initial and subsequent solution releases in a timely fashion. Module 3: Process Model 3 6²53# # 0RGXOH#6=#3URFHVV#0RGHO $FWLYLW\=#0DQDJLQJ#7UDGH0RIIV ,Q#VPDOO#WHDPV=# Activity „ Read...

Ngày tải lên: 10/12/2013, 17:15

... always been to make the best use of data center floor space. Yet today the balance is shifting. New servers are consuming more energy than ever before, causing data center and facilities managers ... cooling equipment. Page 4 Airflow Management in the Data Center There are many simple solutions to improve overall airflow ef- ficiency in the data center that can be implemented immedi- ately, ... dim the lights when no one is in the data center; lights use electricity and generate added heat, which requires added cooling. ã Reduceoverall data centerlightingrequirementsbyusing ...

Ngày tải lên: 10/12/2013, 19:15

... RANGE of modules provides a 24 pair high-density, high performance, cost competitive Category 6 data grade module, (the 25 th pair is not used) and a high-density cost competitive 25 pair Category...

Ngày tải lên: 11/12/2013, 13:15

... GIG WY010-AppA WY010-Kimmel WY010-Kimmel-v1.cls May 29, 2004 1:20 Excel 2003 Object Model Most of the objects in the Excel Object Model have objects with associated collections. The collection object is ... Model oAllowRange.Users.Add "RCR\AgamaOffice", False End If End If End If Next nm End With End Sub Application Object The Application object is the root object of the Excel Object Model. ... object (not the Borders collection): Axis, AxisTitle, ChartArea, ChartObject, ChartTitle, DataLabel, DataTable, DisplayUnitLabel, Downbars, DropLines, ErrorBars, Floor, GridLines, HiLoLines, LeaderLines,...

Ngày tải lên: 13/12/2013, 09:16

... and click the Load Data button. The XML data is retrieved, converted, and loaded into the DataSet component. The binding between the DataSet and the DataGrid copies the data into the Grid for ... the DataGrid component’s dataProvider property and the DataSet component’s dataProvider property. Set the direction to In. 25. Add another binding between the DataGrid component’s selectedIndex ... Data Type parameter for the Date schema field and change it to Date. This tells the DataBinding component to try to work with this value as a date. For more information on data binding and data...

Ngày tải lên: 14/12/2013, 14:15

... Understanding Data Sources and Data Formats A data source is a place from which Flash can load external data (that is, data not directly programmed into the movie). For example, Flash can load data ... a data source. Data transfer is the act of retrieving data from a source or sending data from Flash to another application. In this section, you'll learn about the different types of data ... in URL string format; data contained in objects, arrays, or any other data type is not supported by a string of text. ã XML. This popular formatting standard allows data to be stored in a...

Ngày tải lên: 14/12/2013, 22:15

Ngày tải lên: 20/12/2013, 17:15

... Schema Data Types The following diagram shows the type hierarchy defined in the World Wide Web Consortium (W3C) specification Extensible Markup Language (XML) Schema Part 2: Datatypes. These data ... These data types are used in XML schemas. This specification defines built-in primitive data types, derived data types, and facets. ...

Ngày tải lên: 21/12/2013, 05:17

... 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...

Ngày tải lên: 21/12/2013, 06:16

... Identifying Keys in the Logical Model Exercise 1: Identifying Keys In this exercise, you will identify primary, foreign, and composite keys for a logical data model based on the Ferguson ... 5.1: Identifying Keys in the Logical Model In this activity, you will identify primary, foreign, and (if necessary) composite keys in the logical data model for Ferguson and Bardell, Inc. Objectives ... data model based on the Ferguson and Bardell, Inc. case study. ! Specify the keys in a logical data model 1. Review the ER diagram on the next page. 2. Identify the areas of the ER diagram for...

Ngày tải lên: 21/12/2013, 06:16

... and terminate a data- transmission connection; e.g., a modem. DTE (Data Terminal Equipment): Devices acting as data source, data sink, or both. DYNAMIC BUS CONTROL: The operation of a data bus system ... error-checking mechanism for link-level data transmissions; a characteristic link- level feature of (typically) bit-oriented data communications protocols. The data integrity of a received frame or ... subsystem. SUBSYSTEM: The device or functional unit receiving data transfer service from the data bus. SYNCHRONOUS TRANSMISSION: Transmission in which data bits are sent at a fixed rate, with the transmitter...

Ngày tải lên: 22/12/2013, 10:15

... lý Data Center Hệ thống Data Center I. Giới thiệu hệ thống Data Center - Nơi tích hợp tất cả các công nghệ hàng đầu về mạng, hệ thống và phần mềm ứng dụng được sử dụng trong hệ hống Data ... lý của hệ thống Data Center. III. Yêu cầu phần cứng và phần mềm của hệ thống Data Center 1. Network Chúng tôi giới thiệu sử dụng công nghệ mạng của Cisco System cho hệ thống Data Center - Được ... thống có đủ sức mạnh xử lý và hệ thống Data Center ra đời để đáp ứng các nhu cầu cần thiết. - Kinh tế cũng là vấn đề được đặt ra khi triển khai hệ thống Data Center với chi phí rất lớn nhưng lại...

Ngày tải lên: 22/12/2013, 12:16

... ways in which database schemas evolve. Both the standard temporal model and Asserted Versioning are formalizations of temporal data management within a snapshot of the evolution of a data- base ... for a domain to change over time. But such changes are not changes to data. They are changes to types of data, indeed to datatypes. Domain changes are one form of what computer scientists call ... the object changes, we update that version, just as we update conventional data. We overwrite the old data with the new data, destroying information about what the object used to be like. On the...

Ngày tải lên: 24/12/2013, 02:16

Ngày tải lên: 16/01/2014, 21:20