Under what conditions must a foreign key not be null?
Question:
Under what conditions must a foreign key not be null?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 80% (15 reviews)
A foreign key must not ...View the full answer
Answered By
Carly Cimino
As a tutor, my focus is to help communicate and break down difficult concepts in a way that allows students greater accessibility and comprehension to their course material. I love helping others develop a sense of personal confidence and curiosity, and I'm looking forward to the chance to interact and work with you professionally and better your academic grades.
4.30+
12+ Reviews
21+ Question Solved
Related Book For
Essentials of Database Management
ISBN: 978-0133405682
1st edition
Authors: Jeffrey A. Hoffer, Heikki Topi, Ramesh Venkataraman
Question Posted:
Students also viewed these Computer science questions
-
A pet store currently uses a legacy flat file system to store all of its information. The owner of the store, Peter Corona, wants to implement a Web-enabled database application. This would enable...
-
How are relationships between entities represented in the relational data model?
-
For each of the following relations, indicate the normal form for that relation. If the relation is not in third normal form, decompose it into 3NF relations. Functional dependencies (other than...
-
The Chief Financial Officer at Ford Motor Company is said to usea hybrid-costing system. Define the hybrid-costing system. Explainthe advantages to this company to use this system. I want a 10 page 2...
-
Prior to the Academy Awards ceremony in 2009, the United Kingdom bookmaker Ladbrokes reported the following odds for winning an Oscar in the category of best actress (The Wall Street Journal,...
-
A simple pendulum is mounted in an elevator. What happens to the period of the pendulum (does it increase, decrease, or remain the same) if the elevator (a) Accelerates upward at 5.0 m/s 2 ; (b)...
-
Which variables, in order of importance, are identified as most important for classifying churn?
-
Buddy Holly Companys sales budget projects unit sales of part 198Z of 10,000 units in January, 12,000 units in February, and 13,000 units in March. Each unit of part 198Z requires 2 pounds of...
-
The following information is available for the Johnson Corporation: Beginning inventory $ 25,000 Inventory purchases (on account) 155,000 Freight charges on purchases (paid in cash) 10,000 Inventory...
-
Let X 1 and X 2 be independent, each with unknown mean and known variance 2 = 1. a. Let 1 = X 1 + X 2 /2. Find the bias, variance, and mean squared error of 1 . b. Let 2 = X 1 + 2X 2 /3. Find...
-
For Problem and Exercise 21, draw the E-R diagram based on the normalized relations. Data from Exercise 21. A pet store currently uses a legacy flat file system to store all of its information. The...
-
What is the relationship between the primary key of a relation and the functional dependencies among all attributes within that relation?
-
A square wood column with side dimensions b (see figure) is constructed of a structural grade of eastern white pine for which Fc = 8.0 MPa and E = 8.5 GPa. An axial force P = 100 kN acts on the...
-
You are the manager of internal audit of Coverit Corporation, a large insurance company. One day you receive an urgent letter from the controller expressing his concerns about some organizational...
-
Daintree Ltd. is a large retailer that operates department stores in all major cities throughout Australia. Recently it has expanded its operations into Southeast Asia. Although each store operates...
-
Draw two points P and Q. Then sketch PQ. Add a point R on the ray so that Q is between P and R. C D A B FL E
-
Hypothesis testing and testing claims with confidence intervals are two different approaches that lead to the same conclusion. In the following activities, you will compare and contrast those two...
-
The following system of periodic tasks is scheduled and executed according to a cyclic schedule. Draw an execution trace (timeline) showing two occurances of each task. Ti ei Pi 1 8 T2 4 15 T3 3 20...
-
Describe an implementation of the functions insertBack and insertFront realized by using combinations of only the functions empty and insert.
-
(a) Explain why the concentration of dissolved oxygen in freshwater is an important indicator of the quality of the water. (b) How is the solubility of oxygen in water affected by increasing...
-
Give a description, in pseudocode, for implementing the removeAll method for the set ADT, using only the other fundamental methods of the set.
-
What is the expected running time of the methods for maintaining a maxima set if we insert n pairs such that each pair has lower cost and performance than one before it? What is contained in the...
-
Consider the following variant of the findIndex method of the SortedTableMap class, originally given in Code Fragment 10.11: Does this always produce the same result as the original version? Justify...
-
Describe how the following affect the valuation of PPE. a) Cash Discounts b) Deferred Payment Contracts
-
Lou Barlow, a divisional manager for Sage Company, has an opportunity to manufacture and sell one of two new products for a five - year period. His annual pay raises are determined by his division s...
-
Consider a 5 year debt with a 15% coupon rate paid semi-annually, redeemable at Php1,000 par. The bond is selling at 90%. The flotation cost is Php50 per bind. The firm's tax bracket is 30%.
Study smarter with the SolutionInn App