Computer Science: An Overview (12th Edition)
12th Edition
ISBN: 9780133760064
Author: Glenn Brookshear, Dennis Brylow
Publisher: PEARSON
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Question
Chapter 9, Problem 15CRP
Program Plan Intro
SQL
SQL stands for structured query language. SQL is used basically to manage the data of the
Explanation of Solution
b. List of employees from personnel department who have worked or are working:
NEW1 <- JOIN EMPLOYEE and ASSIGNMENT where EMPLOYEE.EmplId = ASSIGNMENT.EmplId
NEW2 <- JOIN NEW1 and JOB where ASSIGNMENT.JobId = JOB.JobId
NEW3 <- SELECT from NEW2 where JOB.Dept = “Personnel”
NEW4 <- PROJECT EMPLOYEE.Name, EMPLOYEE.Address from NEW3
Explanation:
- The relation “NEW1” contains all the records from the relation “EMPLOYEE” and “ASSIGNMENT” which satisfy the indicated condition...
Explanation of Solution
c. List of employees from personnel department:
NEW1 <- JOIN EMPLOYEE and ASSIGNMENT where EMPLOYEE.EmplId = ASSIGNMENT.EmplId
NEW2 <- JOIN NEW1 and JOB where ASSIGNMENT.JobId = JOB.JobId
NEW3 <- SELECT from NEW2 where JOB.Dept = “Personnel” and ASSIGNMENT.TermDate = “*”
NEW4 <- PROJECT EMPLOYEE.Name, EMPLOYEE.Address from NEW3
Explanation:
- The relation “NEW1” contains all the records from the relation “EMPLOYEE” and “ASSIGNMENT” which satisfy the indicated condition...
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Chapter 9 Solutions
Computer Science: An Overview (12th Edition)
Ch. 9.1 - Identify two departments in a manufacturing plant...Ch. 9.1 - Prob. 2QECh. 9.1 - Summarize the roles of the application software...Ch. 9.2 - Prob. 1QECh. 9.2 - Prob. 2QECh. 9.2 - Prob. 4QECh. 9.2 - Prob. 5QECh. 9.2 - Prob. 6QECh. 9.3 - Prob. 1QECh. 9.3 - What is a persistent object?
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