While the datamodel design process was still underway, an enterprising accountant started putting together data in a spreadsheet already. Tshepo applauded his enthusiasm, but he is worried about the integrity of the data, despite the fact that the accountant says his data is in first normal form already. Here is a sample of the spreadsheet data, in first normal form (underlined columns names indicate the composite primary key): Company Company Department Department Product Product Name ID Name ID Name ID Product Product Type ID 1 Type Name Headset 1 ACME VR 1 Date Value 3306/01/23 521 3306/01/24 -250 Production 1 VR1000 1 1 0 No Product ACME VR ACME VR 1 2 0 No Product 3306/01/23 105 Production HR Finance Production 2 ACME Movies 3 0 No Product 3306/01/23 999 2 ACME Movies 4 2 MC9 2 Camera 3306/01/23 50
While the datamodel design process was still underway, an enterprising accountant started putting together data in a spreadsheet already. Tshepo applauded his enthusiasm, but he is worried about the integrity of the data, despite the fact that the accountant says his data is in first normal form already. Here is a sample of the spreadsheet data, in first normal form (underlined columns names indicate the composite primary key): Company Company Department Department Product Product Name ID Name ID Name ID Product Product Type ID 1 Type Name Headset 1 ACME VR 1 Date Value 3306/01/23 521 3306/01/24 -250 Production 1 VR1000 1 1 0 No Product ACME VR ACME VR 1 2 0 No Product 3306/01/23 105 Production HR Finance Production 2 ACME Movies 3 0 No Product 3306/01/23 999 2 ACME Movies 4 2 MC9 2 Camera 3306/01/23 50
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
Explain how each of the following data anomalies could arise in this sample data:
1 Update anomaly.
2 Insertion anomaly.
3 Deletion anomaly.
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