Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 14, Problem 3RQ
Program Plan Intro
Big Data Problem:
- Over the last years, a new wave of data emerged which is characterised for being high volume, high frequency, and mostly semi-structured.
- These data came from multiple sources such as web site logs, web site posts, and machine generated information.
- But these data contains a lot of hidden information that help the day-to-day business.
- The need to manage this data resulted in a phenomenon called Big Data.
- Big data refers to the vast amount of data which cannot be processed and analysed when traditional computer technologies and tools are applied.
- Big data provides high performance and scalability at a reasonable cost.
- The main characteristics of big data phenomenon are Volume, Variety and Velocity of data
- These three characteristics have been defined as the three Vs.
- Volume refers to the amount of data, variety refers to the number of types of data, and velocity refers to the speed of data processing.
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I want a detailed explanation to
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Q4: Consider the following MAILORDER relational schema describing the data for a mail order
company. (Choose five only).
(10 Marks)
PARTS(Pno, Pname, Qoh, Price, Olevel)
CUSTOMERS(Cno, Cname, Street, Zip, Phone)
EMPLOYEES(Eno, Ename, Zip, Hdate)
ZIP CODES(Zip, City)
ORDERS(Ono, Cno, Eno, Received, Shipped)
ODETAILS(Ono, Pno, Qty)
Qoh stands for quantity on hand: the other attribute names are self-explanatory. Specify and
execute the following queries using the RA interpreter on the MAILORDER database schema.
a. Retrieve the names of parts that cost less than $20.00.
b. Retrieve the names and cities of employees who have taken orders for parts costing more than
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c. Retrieve the pairs of customer number values of customers who live in the same ZIP Code.
d. Retrieve the names of customers who have ordered parts from employees living in Wichita.
e. Retrieve the names of customers who have ordered parts costing less than$20.00.
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ut
da
Q4: Consider the LIBRARY relational database schema shown in Figure below
a. Edit Author_name to new variable name where previous
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عرفنه شنو الحل
BOOK
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e u
al b
are
rage
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d. Remove all books author when author name contains second character 'D' and ending by
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es inf
rmar
nce 1
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عرفته شنو الحل
e. Add one book as variables data?
عرفته شنو الحل
Chapter 14 Solutions
Database Systems: Design, Implementation, & Management
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