An online retailer stores information about the items purchased made by its customers. Each day the following information is summarized and stored in a publicly available database. • The date each item was purchased • The 5-digit product code of each item purchased • The prices in dollars at which the items were purchased • The number of purchases made of each item at each price A sample portion of the database is shown below. Date Product Code Purchase Price Number of purchases 21/05/2017 16342 23.95 7 21/05/2017 18442 23.95 7 21/05/2017 22345 5.88 22 21/05/2017 20964 32.14 10 22/05/2017 16342 24.45 3 22/05/2017 14224 42.99 1 Which of the following CANNOT be determined using only the information in the database? The number of purchases made by an individual customer O The average cost of an individual item purchase on the site. O How many times a certain product was purchased in a given month. O The product code of the most-purchased item on the site in a given year.

An online retailer stores information about the items purchased made by its customers. Each day the following information is summarized and stored in a publicly available database. • The date each item was purchased • The 5-digit product code of each item purchased • The prices in dollars at which the items were purchased • The number of purchases made of each item at each price A sample portion of the database is shown below. Date Product Code Purchase Price Number of purchases 21/05/2017 16342 23.95 7 21/05/2017 18442 23.95 7 21/05/2017 22345 5.88 22 21/05/2017 20964 32.14 10 22/05/2017 16342 24.45 3 22/05/2017 14224 42.99 1 Which of the following CANNOT be determined using only the information in the database? The number of purchases made by an individual customer O The average cost of an individual item purchase on the site. O How many times a certain product was purchased in a given month. O The product code of the most-purchased item on the site in a given year.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

An online retailer stores information about the items purchased made by its customers. Each day the
following information is summarized and stored in a publicly available database.
• The date each item was purchased
• The 5-digit product code of each item purchased
• The prices in dollars at which the items were purchased
• The number of purchases made of each item at each price
A sample portion of the database is shown below.
Date
Product Code
Purchase Price
Number of purchases
21/05/2017
16342
23.95
7
21/05/2017
18442
23.95
7
21/05/2017
22345
5.88
22
21/05/2017
20964
32.14
10
22/05/2017
16342
24.45
22/05/2017
14224
42.99
1
Which of the following CANNOT be determined using only the information in the database?
The number of purchases made by an individual customer
O The average cost of an individual item purchase on the site.
How many times a certain product was purchased in a given month.
O The product code of the most-purchased item on the site in a given year.

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