Capítulo V. Sistemas de Información Gerencial, James O´Brien Por el Profesor presentación Powerpoint
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Capítulo V. Sistemas de Información Gerencial, James O´Brien Por el Profesor presentación Powerpoint
- 1. Data Resource Management Capítulo 5 McGraw-Hill/Irwin Copyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.
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- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- File or table - A group of related records Master file - relatively permanent information, such as the names and addresses of customers or suppliers. Transaction file - routine activity of a business, such as the sale of each product, or the courses that a student took. History file - obsolete transactions or inactive customers, retained for backup purposes Archival file - long-term historical storage Database - An integrated collection of logically related data elements World’s largest database? – World Wide Web / Internet Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Relational - join two or more tables so that he/she can see relevant data in a form that looks like it is in one big table Example relationships on next slide Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Database Administrator (DBA) In charge of enterprise database development Improves the integrity and security of organizational databases Uses Data Definition Language (DDL) to develop and specify data contents, relationships, and structure Stores these specifications in a data dictionary or a metadata repository Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- A data dictionary Contains data about data (metadata) Relies on specialized software component to manage a database of data definitions It contains information on.. The names and descriptions of all types of data records and their interrelationships Requirements for end users’ access and use of application programs Database maintenance Security A data dictionary (metadata repository) is a database management catalog or directory containing metadata (i.e., data about data). A data dictionary relies on a specialized database software component to manage a database of data definitions, which is metadata about the structure, data elements, and other characteristics of an organization’s databases. For example, it contains the names and descriptions of all types of data records and their interrelationships; information outlining requirements for end users’ access and use of application programs; and database maintenance and security. The database administrator can query data dictionaries to report the status of any aspect of a firm’s metadata. The administrator can then make changes to the definitions of selected data elements. Some active (versus passive ) data dictionaries automatically enforce standard data element definitions whenever end users and application programs access an organization’s databases. For example, an active data dictionary would not allow a data entry program to use a nonstandard definition of a customer record, nor would it allow an employee to enter a name of a customer that exceeded the defined size of that data element. Developing a large database of complex Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Database development is a top-down process Develop an enterprise model that defines the basic business process of the enterprise Define the information needs of end users in a business process Identify the key data elements that are needed to perform specific business activities (entity relationship diagrams) Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Data resource management is a managerial activity Uses data management, data warehousing, and other IS technologies Manages data resources to meet the information needs of business stakeholders Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- The database maintenance process is accomplished by transaction processing systems and other end-user applications, with the support of the DBMS. End users and information specialists can also employ various utilities provided by a DBMS for database maintenance. The databases of an organization need to be updated continually to reflect new business transactions (e.g., sales made, products produced, inventory shipped) and other events. Other miscellaneous changes also must be made to update and correct data (e.g., customer or employee name and address changes) to ensure the accuracy of the data in the databases. Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-
- Multimedia Lecture Support Package to Accompany Basic Marketing Lecture Script 6-