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ITM 102 Lecture Notes - Data Manipulation Language, Sql, Data Warehouse

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School
Ryerson University
Department
Information Technology Management
Course
ITM 102
Professor
Vikraman Baskaran

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Document Summary

6. 1 - organizing data in traditional file environment. Program-data dependence: the coupling of data stored in files and the specfic programs required to update and maintain those files so that changes in programs require changes to the data. 6. 2- the database approach to management database management system (dbms): software that permiits an organization to centralize data, manage them efficiently, and provide access to the stored data by application programs. Dbms relieves the programmer or end user from the task of understanding where and how the data are actually stored by separating the logical and physical views of the data. Logical: presents data as they would be perceived by end users or business specialists. Physical: shows how the data are actually organized and structured on physical storage media. How a dbms solves the problems of the traditional file environment. Enables the organization to centrally manage their data.

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Related Questions

which of the following is not the advantage of using a database?

  1. Elimination of the data redundancy
  2. Ability to associate related data
  3. Increased security
  4. Program/data independence
  5. All of the above are advantages

5. The competency modeling approach may be increasing in popularity because: a) competency modeling is useful in today's rapidly changing environment. b) organizations were dissatisfied with the poor reliability of job analysis procedures. c) compared to job analysis, competency modeling provides a better explanation of required tasks. d) the increasing specialization of jobs requires a more rigorous procedure than job analysis. e) competency modeling is more useful than job analysis in hierarchical organizations.

Elton Mayo’s famous experiment at the Hawthorne Plant concluded ________.
 
A.there was a human side to the work environment that essentially gets in the way and most often jeopardizes productivity.
B.people who perceive that management permits them to contribute to work decisions might be more productive.
C.a physical environment with dark rooms can particularly decrease productivity because it puts workers to sleep.
D.robotics has been highly successful in work environments because workers find socialization at work to be highly toxic.