HomeworkLib
Question

Which of the following is NOT true? Mapping an M:N relationship that has no attributes will...

Which of the following is NOT true? Mapping an M:N relationship that has no attributes will result in:

A new relation

Two foreign keys

A composite primary key

A foreign key in both of the relations mapped from the involved entities
engineering   Computer-Science   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Request Professional Answer

Request Answer!

We need at least 10 more requests to produce the answer.

0 / 10 have requested this problem solution

The more requests, the faster the answer.

Request! (Login Required)

All students who have requested the answer will be notified once they are available.
Know the answer?
Add Answer to:
Which of the following is NOT true? Mapping an M:N relationship that has no attributes will...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Similar Homework Help Questions

  • Please answer true or false 27) Relationship instances occur when an instance of one entity is...

    Please answer true or false 27) Relationship instances occur when an instance of one entity is related to an instance of another entity via a relationship. 28) Two columns of a relational table can have the same values. 29) If one of two identical relational tables has the first row moved to the last place, those two relational tables are no longer identical. 30) An entity and its 1:1 unary relationship are mapped as one relation. 31) An entity and...

  • The primary key for M:N relationship tables O is a single attribute. @ always consists of...

    The primary key for M:N relationship tables O is a single attribute. @ always consists of two attributes. O is the primary key of the most important entity linked to that relationship does not exist. Many-to-many relationship tables only use foreign keys

  • Show the ERD for the following piece of the problem statements. Show only entities (or dependent...

    Show the ERD for the following piece of the problem statements. Show only entities (or dependent entities), relationships, multiplicities, primary keys and foreign keys. Create an appropriate primary key if necessary. You don’t need to specify other attributes. If a relationship is M:N, then show two diagrams: both the M:N relationship diagram and its decomposition into two 1:N relationships. (a) A book has one or many keywords and one keyword can be used in zero or many books. (b) A...

  • If a 1:M relationship is optional on both sides, which of the following is true? The...

    If a 1:M relationship is optional on both sides, which of the following is true? The resulting foreign key can have null (empty) values The resulting foreign key cannot have null (empty) values The resulting foreign key must have null (empty) values No foreign key is created as a result of mapping such a relationship

  • This is symbolized by a circle over a single line in an entity relationship diagram. It...

    This is symbolized by a circle over a single line in an entity relationship diagram. It signifies that the supertype does NOT have to be one of the specified subtypes. Partial completeness Total completeness System completeness Associative completeness A supertype entity can contain as many as ____ subtype entities. 10 1 100 no defined limit When you set up an Entity Relationship Diagram, and have a many-to-many relationship, this entity is created to avoid problems inherent to a many-to-many relationship....

  • 6. Create a typical family relationship-spouse, father, and mother-in a single 3NF relation. Include Name and Date of Birth as non-key attributes. Assume that each family member has only one spou...

    6. Create a typical family relationship-spouse, father, and mother-in a single 3NF relation. Include Name and Date of Birth as non-key attributes. Assume that each family member has only one spouse, one father, and one mother. Show foreign keys with dashed undedine, and Primary keys with solid underline. (Come up with your own field names). (3 points) 6. Create a typical family relationship-spouse, father, and mother-in a single 3NF relation. Include Name and Date of Birth as non-key attributes. Assume...

  • QUESTION 1 What is the most common relationship within a relational database? Select the best answer...

    QUESTION 1 What is the most common relationship within a relational database? Select the best answer from the following. One-To-One relationship. o One-To-Many relationship. Many-To-Many relationship. Zero-To-Zero relationship. QUESTION 2 What is an "entity'? Select the best answer from the following. An entity, for our purposes, is the same as a table in the database. An entity represents one of the columns in an individual table. There are no entities in a relational database. Entities are only part of NoSQL...

  • The employee is table, the best candidate for primary key is Select one: a. Department ID...

    The employee is table, the best candidate for primary key is Select one: a. Department ID b. Employee hiredate c. Employee ID d. Employee salary Question 2 A primary key can be composed of more than one attribute. Select one: True False Question 3 A foreign key allows you to join two tables. Select one: True False Question 4 Given two tables, department (dept_id, dept_location, dept_name) and EMPLOYEE(emp_id, emp_name, emp_dept_id, emp_name, emp_salary), which attribute (column) is the foreign key? Select...

  • For this DATABASE homework assignment you will create an Entity Relationship model for a business case...

    For this DATABASE homework assignment you will create an Entity Relationship model for a business case and then convert the model to a set of relations.  Read through the following business case for the “Drum Corps International”  Create an Entity relationship model with the necessary entities, attributes, identifiers and relationships to capture the data requirements.  All relationships should be labeled with verb phrases.  Use UML notation for this work.  Relationship lines should not cross. ...

  • Please show three examples of binary relationship with maximum cardinality of 1:1, 1:N, and N:M (one...

    Please show three examples of binary relationship with maximum cardinality of 1:1, 1:N, and N:M (one for each). For each example, Identify two entities and their primary keys Identify and justify the maximum cardinality Now that we have we had three examples of binary relationship with maximum cardinality of 1:1, 1:N, and N:M (one for each). In addition, please refine the cardinality. For each example you had: Identify 3 or 4 attributes (including primary key) for each entity. Place foreign...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT