СУБД Oracle / Литература / PowerDesigner 9 / CDM_Tutorial
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Sybase®
PowerDesigner®
Conceptual Data Model
Getting Started
Version 9.5.1 38085-01-0951-01 Last modified: December 2002
Copyright © 2002 Sybase, Inc. All rights reserved.
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All other trademarks are property of their respective owners.
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What you will do........................................................................ |
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How long it will take ............................................................ |
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What you will learn ............................................................. |
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Setting up.................................................................................. |
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Start PowerDesigner................................................................. |
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Open a new CDM ..................................................................... |
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Use the tools in the tool palette............................................... |
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Open the tutorial CDM ............................................................ |
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Define CDM preferences and options..................................... |
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Define CDM properties ........................................................... |
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Save the tutorial CDM............................................................. |
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Create a new business rule .................................................... |
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Create a domain ..................................................................... |
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Create a data item .................................................................. |
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Attach a data item to a domain ............................................... |
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Create an entity....................................................................... |
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Create an associative entity.................................................... |
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Define entity attributes ............................................................ |
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Add data items to an entity............................................... |
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Create an entity attribute .................................................. |
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CDM Getting Started |
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Designate an identifier ............................................................ |
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Attach a business rule to an entity.......................................... |
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Create a relationship............................................................... |
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Define roles in an optional relationship ................................... |
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Create a package ................................................................... |
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Open a diagram for the package ............................................ |
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Add objects to the package .................................................... |
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Accessing a target object from a shortcut .............................. |
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Create an inheritance link ....................................................... |
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Define inheritance properties.................................................. |
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Add a title box ......................................................................... |
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Change the color of the title box ............................................. |
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Change the color of the window.............................................. |
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Arrange the symbols ............................................................... |
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Center the model on the page ................................................ |
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Print the model........................................................................ |
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Generate the PDM.................................................................. |
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Save and close the PDM ........................................................ |
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Exit PowerDesigner ................................................................ |
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This book contains step-by-step tutorials for the PowerDesigner Conceptual Data Model modeling environment. It shows you how to do the following:
♦Build a Conceptual Data Model (CDM)
♦Use business rules and other model objects
♦Generate a Physical Data Model (PDM)
This book is for anyone who will be building data models with PowerDesigner. Some familiarity with relational databases, SQL, and design methodology is helpful, but not required. For more information, see the Bibliography section at the end of this chapter.
The PowerDesigner modeling environment supports several types of models:
♦&RQFHSWXDO 'DWD 0RGHO &'0 to model the overall logical structure of a database, independent from any software or data storage structure considerations
♦3K\VLFDO 'DWD 0RGHO 3'0 to model the overall physical structure of a database, taking into account DBMS software or data storage structure considerations
♦2EMHFW 2ULHQWHG 0RGHO 220 to model a software system using an object-oriented approach for Java or other object languages
♦%XVLQHVV 3URFHVV 0RGHO %30 to model the means by which one or more processes are accomplished in operating business practices
♦)UHH 0RGHO )(0 to create any kind of chart diagram, in a contextfree environment
CDM Getting Started |
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This book only contains the basics of the Conceptual Data Model. For information on other models or aspects of PowerDesigner, consult the following books:
*HQHUDO )HDWXUHV *XLGH To get familiar with the PowerDesigner interface before learning how to use any of the models.
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To work with the CDM. |
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To learn the basics of the PDM. |
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To work with the PDM. |
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%XVLQHVV 3URFHVV 0RGHO *HWWLQJ 6WDUWHG To learn the basics of the BPM.
%XVLQHVV 3URFHVV 0RGHO 8VHU V *XLGH To work with the BPM.
5HSRUWV 8VHU¶V *XLGH To create reports for any or all models.
5HSRVLWRU\ *HWWLQJ 6WDUWHG To learn the basics of the Repository.
5HSRVLWRU\ 8VHU¶V *XLGH To work in a multi-user environment using a central repository.
PowerDesigner documentation uses specific typefaces to help you readily identify specific items:
♦monospace text (normal and EROG)
Used for: Code samples, commands, compiled functions and files, references to variables.
Example: declare user_defined…, the
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Object codes, reversed objects, file names + extension.
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Any key name. |
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Example: Press the ENTER key. |
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Example: Click the 6HOHFWLRQ tab. Select )LOH!2SHQ. |
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Information engineering |
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James Martin, Prentice Hall, 1990, three volumes of 178, 497, and 625 pages |
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respectively; clothbound, ISBN 0-13-464462-X (vol. 1), 0-13-464885-4 (vol. |
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2), and 0-13-465501-X (vol. 3). |
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Data Modeling Essentials
Graeme Simsion, Van Nostrand Reinhold, 1994, 310 pages; paperbound;
ISBN 1850328773
Celko95
Joe Celko, Joe Celko’s SQL for Smarties (Morgan Kaufmann Publishers,
Inc., 1995), 467 pages; paperbound; ISBN 1-55860-323-9.
CDM Getting Started |
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PowerDesigner |
C H A P T E R 1
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This tutorial is a series of lessons in which you learn how to use
PowerDesigner to build a Conceptual Data Model (CDM).
In this tutorial, you complete the CDM delivered in the tutorial file. This model is based on a real-life example of an information system. It provides a context for the exercises. As you build onto this model, you learn how to create all the basic elements of a CDM. You can then apply your knowledge to creating a CDM to suit your needs.
What is a CDM? A CDM represents the overall structure of an information system. It describes the conceptual relationships of different types of information rather than their physical structures. A CDM is independent of a particular database management system (DBMS).
Why build a CDM? In a CDM, you can put design issues first because you do not have to worry about the details of physical implementation. You deal principally with entities and their relationships. These are easy to understand and to manipulate.
Through a simple generation procedure, you can transfer the solid design framework of the CDM to the Physical Data Model (PDM). The PDM adapts your design to the specifics of a DBMS and puts you well on the way to complete physical implementation.
CDM Getting Started |
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Chapter 2 |
You begin by preparing a business description and stating the business |
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problems to solve. You will refer to this statement in order to decide what |
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business rules, data items, and entities you need to create. |
Chapter 3 |
You will open the tutorial CDM. This CDM presents the conceptual structure |
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of a publishing enterprise. |
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You will specify model preferences and properties, then save the model |
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under a new name. |
Chapter 4 |
You will create business rules, domains, and data items to complete the |
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CDM. |
Chapter 5 |
You will add entities to the tutorial model. You will define entity attributes |
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and designate an identifier. You will also attach a business rule to an entity. |
Chapter 6 |
You will create relationships between entities. You will create relationships |
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with different cardinalities, as well as mandatory and dependent relationships. |
Chapter 7 |
You will create a package in which you will add a shortcut to an entity in the |
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global model |
Chapter 8 |
You will create an inheritance link. |
Chapter 9 |
You will use the display options and tools to organize the model. You will |
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insert a title box and change its color. You will use the alignment tools to |
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align symbols and straighten relationship lines. |
Chapter 10 |
You will generate a Physical Data Model (PDM) from the CDM. You will |
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define the generation parameters, generate the PDM, then save and close the |
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PDM. |
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You can do the CDM tutorial in one sitting in about 1½ hours. You can stop after any chapter and continue at another time.
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PowerDesigner |