HomeworkLib
Question

Union operation requires (RA): (Select multiple answers when applicable and explain fully your answer.) A. Two...

Union operation requires (RA): (Select multiple answers when applicable and explain fully your answer.)

A. Two relations to be related via foreign and primary key

B. Two relations to have the same number of rows

C. Two relations to have the same number of columns

D. Corresponding attributes must have the same basic data type

E. Corresponding attributes must have the same data type

business   Operations-Management   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

E. Corresponding attributes must have the same data type

In this both the corresponding attributes should have the same number but rather that both the attributes should, have a similar "data type".

A Thumbs Up! Would be really helpful for me. If you have any questions, please leave a comment and I will get back to you as soon as possible.

0 0
Add a comment
Know the answer?
Add Answer to:
Union operation requires (RA): (Select multiple answers when applicable and explain fully your answer.) A. Two...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 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...

  • 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...

  • Consider the following relational database to manage concert and ticket sales. The relations are artist, concert,...

    Consider the following relational database to manage concert and ticket sales. The relations are artist, concert, venue, seat, ticket, and fan. The schemas for these relations (with primary key attributes underlined) are: Artist-schema = (artistname, type, salary) Concert-schema = (artistname, date, venuename, artistfees) Venue-schema = (venuename, address, seating_capacity) Seat-schema=(venuename, row, seatnumber) Ticket-schema = (fanID, date, venuename, row, seatnumber) Fan-schema = (fanID, name, address, creditcardno) Where: • artistname is a unique name for the artist (because of trademark/copyright rules no two...

  • 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...

  • Understanding Databases: Exercises Type your answers into this Word document. Save when completed and submit as...

    Understanding Databases: Exercises Type your answers into this Word document. Save when completed and submit as a file upload. You are a manager of an HIM department and you want to track how many charts each of your employees scanned and indexed. This is the data you found. On Monday, John did 10 charts, Sue did 25 charts, and Maria did 20 charts. On Tuesday, John did 12 charts, Sue did 22 charts, and Maria did 20 charts. On Wednesday,...

  • Please help me with this question. I would really appreciate it. Please explain briefly I am...

    Please help me with this question. I would really appreciate it. Please explain briefly I am trying to prepare for a test. Consider the following relational database to manage concert and ticket sales. The relations are artist, concert, venue, seat, ticket, and fan. The schemas for these relations (with primary key attributes underlined) are: Artist-schema = (artistname, type, salary) Concert-schema = (artistname, date, venuename, artistfees) Venue-schema = (venuename, address, seating_capacity) Seat-schema=(venuename, row, seatnumber) Ticket-schema = (fanID, date, venuename, row, seatnumber)...

  • A nonprofit organization depends on a number of different types of persons for its successful operation....

    A nonprofit organization depends on a number of different types of persons for its successful operation. The organization is interested in the following attributes for all of these persons: SSN, Name, Address, City/State/Zip, and Telephone. Three types of persons are of greatest interest: employees, volunteers, and donors. Employees have only a Date Hired attribute, and volunteers have only a Skill attribute. Donors have only a relationship (named Donates) with an Item entity type. A donor must have donated one or...

  • please use dia to draw the e-r diagram to create Entity - Relationship Diagrams then use MS access This project requires you to create a database design. Your design will be documented in a set o...

    please use dia to draw the e-r diagram to create Entity - Relationship Diagrams then use MS access This project requires you to create a database design. Your design will be documented in a set of Entity-Relationship Crow's Foot diagrams using the representation as shown in the lecture materials. Draw a set of Entity-Relationship diagrams to model the following scenario. The Maggs Realty Company wants to track the Sales Offices that they have across all of Ontario They are interested...

  • Really need help on this, apperciate all answers and feedback =D. You are the Senior Consultant...

    Really need help on this, apperciate all answers and feedback =D. You are the Senior Consultant at Abacus Consulting, tasked with the database project for Amadeus Real Estate client. The company employs real estate agents who work with customers to buy and sell properties (both residential and commercial). As part of your lead role, you are initially responsible for meeting with the client team and gathering requirements. You are then scheduled to design the data model and implement a working...

  • QUESTION: (Answer in SQL) Write an SQL query to find all pairs of users (A,B) such...

    QUESTION: (Answer in SQL) Write an SQL query to find all pairs of users (A,B) such that both A and B have blurted on a common topic but A is not following B. Your query should print the names of A and B in that order. BACKGROUND INFO: Users can post their thoughts in form of short messages that we call “blurts”. When signing up, users need to provide their email and a password of their choice. In addition, they...

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