« previous next »

Author Question: What is the difference between an entity type and an entity instance? What will be an ideal ... (Read 79 times)

asd123

  • Hero Member
  • *****
  • Posts: 557
on: Jul 7, 2018
What is the difference between an entity type and an entity instance?
 
  What will be an ideal response?

Question 2

In 1998, ANSI/SPARC published an important document describing the three-schema architecture.
 
  Indicate whether the statement is true or false
Modern Database Management ¦ Hoffer, Venkataraman, Topi ¦ 13th Edition
Buy Test-Bank


Tabitha_2016

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 7, 2018
Answer to Question 1

An entity type is a collection of entities that share common properties. An entity instance is a single occurrence of an entity type. So, for example, STUDENT is an entity type and John Smith is an entity instance.

Answer to Question 2

FALSE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Flower part number is a characteristic difference between monocots and eudicots Flower part number is a characteristic difference between monocots and eudicots
Suture Use, Size, and Type of Material Suture Use, Size, and Type of Material
Effect of stimulus type on graded potentials. Effect of stimulus type on graded potentials.
Basalt is the most common type of stone used in hot stone therapy. Basalt is the most common type of stone used in hot stone therapy.
Difference Between a Sidereal Month and a Synodic Month Difference Between a Sidereal Month and a Synodic Month
Video: Contraction and Relaxation Animation

For a complete list of videos, visit our video library