Question

Identify what you think should be candidate keys, and write in your own words the constraints...

Identify what you think should be candidate keys, and write in your own words the constraints under which each candidate key would be valid.

Business   Accounting   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Solution:-

Identify what you think should be candidate keys, and write in your own words the constraints under which each candidate key would be valid:-

Any relation schema may have more than one key. In this case, each of the keys is called a candidate key. It is common to designate one of the candidate keys as the primary key of the relation. This is the candidate key whose values are used to identify tuples in the relation. All possible candidate keys include the following:

  1. (Univ_Section#) - If it is unique across all semesters.
  2. (Semester, BuildingCode, Room#, TimePeriod, Weekdays) - If more than one course cannot be conducted in the same room during a particular semester.
  3. (InstructorName, Semester) - If an instructor can only teach one course in each semester.
  4. (Course#, Univ_Section#, Semester) - would be the candidate key, If (Univ_Section#) is not unique across all semesters.

0 0
Know the answer?
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

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In your own words, what do you think of a couple who is living together? What...
In your own words, what do you think of a couple who is living together? What would your parents think? What would your grandparents think? Why have attitudes changed? Are they changing still?
In a brief statement, in your own words, please describe why you are an ideal candidate...
In a brief statement, in your own words, please describe why you are an ideal candidate for a store manager position.
Write about 300 words (in your own words), showing your understanding of 'semiconductors'. It should be...
Write about 300 words (in your own words), showing your understanding of 'semiconductors'. It should be a qualitative text with an introduction about 50 words, a body paragraph about 225 words and a conclusion about 25 words.
Please read below question and give the answer Write in your own words ---- own words...
Please read below question and give the answer Write in your own words ---- own words minimum 500 words limit 1. What are four functions of management and how would innovation affect these function in an organization? Note: Please include the references and write in your own words.
Using your own words, define the term "humanities." What do you think humanities is and what...
Using your own words, define the term "humanities." What do you think humanities is and what does it pertain to?
In your own words, what kind of false beliefs about rape you think is the most...
In your own words, what kind of false beliefs about rape you think is the most dangerous and why?
In your own words, create three simple arguments. Each argument should instantiate one of the valid...
In your own words, create three simple arguments. Each argument should instantiate one of the valid or invalid argument.
In your own words what are your parents and/or grandparents view on contraception. Do you think...
In your own words what are your parents and/or grandparents view on contraception. Do you think your parents/grandparents wish that the alternatives available today were available in their day? How might their lives be different if these alternatives were available?
How would you define critical thinking in your own words. Next, think of a time that...
How would you define critical thinking in your own words. Next, think of a time that you have used critical thinking. Describe what happened, how you used critical thinking, and how this benefited you.
Miller six focal concerns, or values that guide our behavior. In your own words of what...
Miller six focal concerns, or values that guide our behavior. In your own words of what you think they mean, write it for this assignment.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT