An Introduction to Database and Database Designing. R C Goyal Principal Scientist IASRI, New Delhi. Databases Before the Use of Computers. Data kept in books, ledgers, card files, folders, and file cabinets Long response time Labor-intensive Often incomplete or inaccurate.
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An Introduction to Database and Database Designing
R C Goyal
IASRI, New Delhi
Dataknown facts that can be recorded and that has implicit meaning
Meaningless data becomes information when it is processed and presented to the decision maker in a meaningful way
Data Conversion and loading
Evaluation & Maintenance
Current systems evaluation
Development of standards
Typical flat-file table
Eliminate Redundant Data: no longer repeating student name, advisor, and adv-room for each class
One student can take many classes, and one class can be taken by many students.