EBK 3N3-EBK: PROGRAMMING W/MICROSOFT VI
8th Edition
ISBN: 9780176920159
Author: ZAK
Publisher: VST
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Chapter 4, Problem 1MQ4
Explanation of Solution
AndAlso operator:
- The AndAlso logical operator evaluates to be “true” when all the sub-conditions are “true” in the compound condition.
OrElse operator:
- The OrElse logical operator evaluates to be “true”, when any one of the sub-conditions is “true” in the compound condition...
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Consider the following database for some store:
Customers (cid, cname, city, discount)Agents (aid, aname, city, percent)Products (pid, pname, city, quantity, price)Orders (ordno, mon, cid, aid, pid, qty, dollars)
The relation Customers records the ID (cid), name (cname), location (city) of each customer and a discount percentage (discount) for this customer.
The relation Agents records the ID (aid), name (aname), location (city) of each agent and a transaction fee (percent) charged by this agent.
The relation Products lists the ID (pid), name (pname), location (city), quantity and price of available products.
And finally, the relation Orders contains a unique order number (ordno), the month (mon), customer (cid), agent (aid), product (pid), quantity (qty) of each order as well as the total value (dollars) of the transaction.
1. Express the following query in SQL
(a) List customers (names) who do not have discounts but purchased at least one product of price greater than $50.
(b) Find…
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…
Chapter 4 Solutions
EBK 3N3-EBK: PROGRAMMING W/MICROSOFT VI
Ch. 4 - Prob. 1MQ1Ch. 4 - Prob. 2MQ1Ch. 4 - Prob. 3MQ1Ch. 4 - Prob. 1MQ2Ch. 4 - Prob. 2MQ2Ch. 4 - Prob. 3MQ2Ch. 4 - Prob. 4MQ2Ch. 4 - What is the opposite of greater than?Ch. 4 - Prob. 1MQ3Ch. 4 - Prob. 2MQ3
Ch. 4 - Prob. 3MQ3Ch. 4 - Prob. 4MQ3Ch. 4 - Prob. 1MQ4Ch. 4 - Prob. 2MQ4Ch. 4 - Prob. 3MQ4Ch. 4 - Prob. 1MQ5Ch. 4 - Prob. 2MQ5Ch. 4 - Prob. 3MQ5Ch. 4 - Prob. 1MQ6Ch. 4 - Jake’s Car Rental charges each customer a daily...Ch. 4 - Prob. 1MQ7Ch. 4 - Prob. 2MQ7Ch. 4 - Write a Case clause that specifies all numbers...Ch. 4 - Prob. 1MQ8Ch. 4 - Prob. 2MQ8Ch. 4 - Prob. 3MQ8Ch. 4 - A form contains six radio buttons. Three of the...Ch. 4 - Which property of the KeyPress procedures e...Ch. 4 - Which property of the KeyPress procedure’s e...Ch. 4 - Prob. 3MQ9Ch. 4 - Prob. 4MQ9Ch. 4 - Prob. 5MQ9Ch. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 10RQCh. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Use the code shown in Figure 4-54 to answer Review...Ch. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - Prob. 25RQCh. 4 - It is customary in Windows applications to...Ch. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Which of the following statements is equivalent to...Ch. 4 - The six logical operators are listed below....Ch. 4 - An expression can contain arithmetic, comparison,...Ch. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - Prob. 3ECh. 4 - Prob. 7ECh. 4 - Prob. 11ECh. 4 - The purpose of this exercise is to demonstrate the...
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