This topic contains a solution. Click here to go to the answer

Author Question: To create a new SQL query, click the New Query button. Indicate whether the statement is true or ... (Read 225 times)

tnt_battle

  • Hero Member
  • *****
  • Posts: 556
To create a new SQL query, click the New Query button.
 
  Indicate whether the statement is true or false

Question 2

Describe and discuss the main elements of the Entity-Relationship (E-R) model. Include an example.
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ASDFGJLO

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

FALSE

Answer to Question 2

The E-R model is basically made up of entities, attributes and relationships. Entities represent the things people want to keep track of, such as customers and products. Each thing is presented by an entity or entity classin this case CUSTOMER and PRODUCT. Individual members of each entity class are called entity instancesfor example CUSTOMER John Smith and PRODUCT Canned Tomato Soup. Each entity is described by a set of attributes. For example, a CUSTOMER will have a CustomerNumber, a LastName and a FirstName, while a PRODUCT will have a ProductNumber and a Description. These, of course, have specific values for each entity instance. Finally, the entities are connected by relationships. There are relationship classes between entity classes and relationship instances between entity instances. For example, in general a CUSTOMER buys a PRODUCT, and a PRODUCT is sold to a CUSTOMER. Specifically, CUSTOMER John Smith buys a PRODUCT Canned Tomato Soup.




tnt_battle

  • Member
  • Posts: 556
Reply 2 on: Jul 7, 2018
YES! Correct, THANKS for helping me on my review


6ana001

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Excellent

 

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

For a complete list of videos, visit our video library