Systems Analysis and Design, 2nd edition


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Systems Analysis and Design

Joseph S. He received the Ph. His teaching interests include systems analysis and design, collaborative computing, project management, and management of information systems. Hoffer earned hisA.

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Hoffer is currently an associate director of the Teradata University Network. Leonard M. Professor Jessup received his B. He received his Ph. He teaches in various areas of Management and Management Information Systems and has published, presented, and consulted on electronic commerce, computer-supported collaborative work, technology-supported teaching and learning, and on related topics.

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With Joseph S. With his wife, Joy L. Approaches to Analysis and Design 3. Communicating with People 4.

Table of Contents

Building better systems 5. Project Management 6. Systems Analysis: Concepts 7. Systems Analysis: Planning the Approach 8. Systems Analysis: Asking questions and collecting data 9. Systems Analysis: Recording the Information Object Orientated Methods Systems Analysis: Modelling Systems Behaviour Systems Analysis: Meeting Business Requirements From Analysis to Design Systems Design: Information Security This will include the specification of an appropriate storage schema, security enforcement, external schema and so on. Implementation is heavily influenced by the choice of available DBMSs, database tools and operating environment.

There are additional tasks beyond simply creating a database schema and implementing the constraints — data must be entered into the tables, issues relating to the users and user processes need to be addressed, and the management activities associated with wider aspects of corporate data management need to be supported. We look at some of these concerns briefly now.

In practice, implementation of the logical schema in a given DBMS requires a very detailed knowledge of the specific features and facilities that the DBMS has to offer. In an ideal world, and in keeping with good software engineering practice, the first stage of implementation would involve matching the design requirements with the best available implementing tools and then using those tools for the implementation.

In database terms, this might involve choosing vendor products with DBMS and SQL variants most suited to the database we need to implement.


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Consequently, implementation can involve additional flexing of the design to overcome any software or hardware limitations. After the logical design has been created, we need our database to be created according to the definitions we have produced.

OBJECT-ORIENTED SYSTEMS ANALYSIS AND DESIGN USING UML 2ND EDITION by BENNETT

For an implementation with a relational DBMS, this will probably involve the use of SQL to create tables and constraints that satisfy the logical schema description and the choice of appropriate storage schema if the DBMS permits that level of control. Whatever mechanism is used to implement the logical schema, the result is that a database, with tables and constraints, is defined but will contain no data for the user processes.


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After a database has been created, there are two ways of populating the tables — either from existing data or through the use of the user applications developed for the database. For some tables, there may be existing data from another database or data files. For example, in establishing a database for a hospital, you would expect that there are already some records of all the staff that have to be included in the database.

Data might also be brought in from an outside agency address lists are frequently brought in from external companies or produced during a large data entry task converting hard-copy manual records into computer files can be done by a data entry agency. In such situations, the simplest approach to populate the database is to use the import and export facilities found in the DBMS. Facilities to import and export data in various standard formats are usually available these functions are also known in some systems as loading and unloading data. Importing enables a file of data to be copied directly into a table.

When data are held in a file format that is not appropriate for using the import function, then it is necessary to prepare an application program that reads in the old data, transforms them as necessary and then inserts them into the database using SQL code specifically produced for that purpose. The transfer of large quantities of existing data into a database is referred to as a bulk load. Bulk loading of data may involve very large quantities of data being loaded, one table at a time so you may find that there are DBMS facilities to postpone constraint checking until the end of the bulk loading.

Skip to content Increase Font Size. Describe the waterfall model. List the steps.

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What needs to be modified in the waterfall model to accommodate database design? Provide the iterative steps involved in database design. Previous: Chapter 12 Normalization. Next: Chapter 14 Database Users.

Systems Analysis and Design, 2nd edition Systems Analysis and Design, 2nd edition
Systems Analysis and Design, 2nd edition Systems Analysis and Design, 2nd edition
Systems Analysis and Design, 2nd edition Systems Analysis and Design, 2nd edition
Systems Analysis and Design, 2nd edition Systems Analysis and Design, 2nd edition
Systems Analysis and Design, 2nd edition Systems Analysis and Design, 2nd edition
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