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Database Systems: Design, Implemen...

11th Edition
Steven + 8 others
ISBN: 9781285196145

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BuyFindarrow_forward

Database Systems: Design, Implemen...

11th Edition
Steven + 8 others
ISBN: 9781285196145
Textbook Problem

FIGURE P1.5 The File Structure for Problems 5-8

images

Identify and discuss the serious data redundancy problems exhibited by the file structure shown in Figure P1.5.

Program Plan Intro

Data redundancy:

  • Data redundancy is presence of repeated data in the storage device. It consists of duplicate data that is additional to the actual data.
  • In this case, the data related to a folder can be seen in other folders. For example, file related to science folder can be seen in mathematics or social.
Program Explanation

Detection of data redundancy in the given file structure:

  • JOB_CODE named EE and CT occurs more than once so if the data present in their records are changed then all other related records must be updated else it will become complex to utilize the data.
  • JOB_CHG_HOUR is having different values for every JOB_CODE and JOB_CHG_HOUR...

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