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Database Management Systems by Abraham Mallén | 2.58 MB
Title: 325.pdf
Author: abc
Category: Nonfiction, Computers, Database Management, General Computing
Language: English | 197 Pages | ISBN: 1230005971268
Description:
In computerized information system data are the basic resource of the organization. So, proper organization and management for data is required for organization to run smoothly. Database management system deals the knowledge of how data stored and managed on a computerized information system. In any organization, it requires accurate and reliable data for better decision making, ensuring privacy of data and controlling data efficiently.
The examples include deposit and/or withdrawal from a bank, hotel, airline or railway reservation, purchase items from supermarkets in all cases, a database is accessed.
What is data?
Data are the known facts or figures that have implicit meaning. It can also be defined as it is the representation of facts, concepts or instructions in a formal manner, which is suitable for understanding and processing. Data can be represented in alphabets (A-Z, a-z), digits (0-9) and using special characters (+,-.#,$, etc)
e.g: 25, "ajit" etc.
Information:
Information is the processed data on which decisions and actions are based. Information can be defined as the organized and classified data to provide meaningful values.
Eg: "The age of Ravi is 25"
File:
File is a collection of related data stored in secondary memory.
File Oriented Approach:
The traditional file oriented approach to information processing each application has a separate master file and its own set of personal file. In file oriented approach the program dependent on the files and files dependent upon the programs.
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