Pearson eText for Computer Science: An Overview -- Instant Access (Pearson+)
13th Edition
ISBN: 9780137503216
Author: Glenn Brookshear, Dennis Brylow
Publisher: PEARSON+
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Chapter 8, Problem 48CRP
a.
Program Plan Intro
Data type:
The data type is a characteristic that tells about the type of data.
b.
Program Plan Intro
Data type:
The data type is a characteristic that tells about the type of data.
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Consider the following relational schema and briefly answer the questions that follow:
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
a. Define a table constraint on Dept that will ensure that all managers have age > 30.
b. Write SQL statements to delete all information about employees whose salaries exceed that of the manager of one or more departments that they work in. Be sure to ensure that all the relevant integrity constraints are satisfied after your updates.
Consider the following relations:
Student(snum: integer, sname: string, rmajor: string,
level: string, age: integer)
Class(cname: string, meets_at: time, room: string, fid: integer)
Enrolled(snum: integer, cname: string)
Faculty(fid: integer, fname: string, deptid: integer)
The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.
2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.
(a) Every faculty member must teach at least two courses.
(b) Every student must be enrolled in the course called 'Math101'.
(c) A student cannot add more than two courses at a time…
Consider the following relational schema. An employee can work in more than one department; the pct_time field of the Works relation shows the percentage of time that a given employee works in a given department.
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
Write the following queries in SQL:
a. Print the name of each employee whose salary exceeds the budget of all of the departments that he or she works in.
b. Find the enames of managers who manage only departments with budgets larger than $1 million, but at least one department with budget less than $5 million.
Chapter 8 Solutions
Pearson eText for Computer Science: An Overview -- Instant Access (Pearson+)
Ch. 8.1 - Give examples (outside of computer science) of...Ch. 8.1 - Prob. 2QECh. 8.1 - Prob. 3QECh. 8.1 - Prob. 4QECh. 8.1 - Prob. 5QECh. 8.2 - In what sense are data structures such as arrays,...Ch. 8.2 - Prob. 2QECh. 8.2 - Prob. 3QECh. 8.3 - Prob. 1QECh. 8.3 - Prob. 2QE
Ch. 8.3 - Prob. 3QECh. 8.3 - Prob. 4QECh. 8.3 - Modify the function in Figure 8.19 so that it...Ch. 8.3 - Prob. 7QECh. 8.3 - Prob. 8QECh. 8.3 - Draw a diagram representing how the tree below...Ch. 8.4 - Prob. 1QECh. 8.4 - Prob. 2QECh. 8.4 - Prob. 3QECh. 8.4 - Prob. 4QECh. 8.5 - Prob. 1QECh. 8.5 - Prob. 3QECh. 8.5 - Prob. 4QECh. 8.6 - In what ways are abstract data types and classes...Ch. 8.6 - What is the difference between a class and an...Ch. 8.6 - Prob. 3QECh. 8.7 - Suppose the Vole machine language (Appendix C) has...Ch. 8.7 - Prob. 2QECh. 8.7 - Using the extensions described at the end of this...Ch. 8.7 - In the chapter, we introduced a machine...Ch. 8 - Prob. 1CRPCh. 8 - Prob. 2CRPCh. 8 - (Asterisked problems are associated with optional...Ch. 8 - Prob. 4CRPCh. 8 - (Asterisked problems are associated with optional...Ch. 8 - Prob. 6CRPCh. 8 - Prob. 7CRPCh. 8 - Prob. 8CRPCh. 8 - Prob. 9CRPCh. 8 - Prob. 10CRPCh. 8 - Prob. 11CRPCh. 8 - Prob. 12CRPCh. 8 - Prob. 13CRPCh. 8 - Prob. 14CRPCh. 8 - Prob. 15CRPCh. 8 - Prob. 16CRPCh. 8 - Prob. 17CRPCh. 8 - Prob. 18CRPCh. 8 - Design a function to compare the contents of two...Ch. 8 - (Asterisked problems are associated with optional...Ch. 8 - (Asterisked problems are associated with optional...Ch. 8 - Prob. 22CRPCh. 8 - Prob. 23CRPCh. 8 - Prob. 24CRPCh. 8 - (Asterisked problems are associated with optional...Ch. 8 - Prob. 26CRPCh. 8 - Prob. 27CRPCh. 8 - Prob. 28CRPCh. 8 - Prob. 29CRPCh. 8 - Prob. 30CRPCh. 8 - Design a nonrecursive algorithm to replace the...Ch. 8 - Prob. 32CRPCh. 8 - Prob. 33CRPCh. 8 - Prob. 34CRPCh. 8 - Draw a diagram showing how the binary tree below...Ch. 8 - Prob. 36CRPCh. 8 - Prob. 37CRPCh. 8 - Prob. 38CRPCh. 8 - Prob. 39CRPCh. 8 - Prob. 40CRPCh. 8 - Modify the function in Figure 8.24 print the list...Ch. 8 - Prob. 42CRPCh. 8 - Prob. 43CRPCh. 8 - Prob. 44CRPCh. 8 - Prob. 45CRPCh. 8 - Prob. 46CRPCh. 8 - Using pseudocode similar to the Java class syntax...Ch. 8 - Prob. 48CRPCh. 8 - Identify the data structures and procedures that...Ch. 8 - Prob. 51CRPCh. 8 - In what way is a class more general than a...Ch. 8 - Prob. 53CRPCh. 8 - Prob. 54CRPCh. 8 - Prob. 55CRPCh. 8 - Prob. 1SICh. 8 - Prob. 2SICh. 8 - In many application programs, the size to which a...Ch. 8 - Prob. 4SICh. 8 - Prob. 5SICh. 8 - Prob. 6SICh. 8 - Prob. 7SICh. 8 - Prob. 8SI
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