What is a data model and what is it purpose

Assignment Help Database Management System

Reference no: EM13707286

Name the three stages in the process of developing database system summarize the tasks in each?

Answer the given questions and also justify your answers with proper examples

Question 1: What is a data model and what is it purpose?

Question 2: What is a prototype and what is its purpose?

Question 3: What is a use case, and what is its purpose?

Question 4: Provide an example of a data constraint .?

Question 5: Provide an example of a business rule that would need to be documented in a data base development project?

Question 6: Define the term entity and give an example other than those used in this book?

Question 7: Explain the difference between an entity class and an entity instance.?

Question 8: Define the term attribute and give examples for the entity you described in question 4.7?

Question 9: Define the term identifier and indicate which attribute defined in your answer to question 4.9 identifies the entity?

Question 10: Define the term composite identifier and give an example other than those used in this book?

Question 11: Define the term relationship and give an example other than those used in this book?

Question 12: Explain the difference between a relationship class and a relationship instance?

Question 13: Define the term degree of relationship and give an example other than one used in this text of a relationship greater than degree two .?

Question 14: Define the term maximum cardinality and minimum cardinality ?

Question 15: Explain the ambiguity in the definition of the term weak entity .explain how this book interprets this term.?

Please give a detailed answer so that I may learn from it. Thank you!

Reference no: EM13707286

Questions Cloud

Find the sum and difference for numbers : Write a program that prompts the user for two numbers, finds the sum and difference for those numbers and displays a descriptive label for each computation by calling two different functions. Use Function Prototypes.

What does the execute bit mean for a directory : What does the 'execute' bit mean for a directory? Show how the execute bit works for referencing files within directories. Does the execute bit need to be set for ANY directory on the path to a file you wish to reference?

Representing an investment value and interest rate : Write a Java test program, all your code should be in the main method that asks the user for two numbers representing an investment value and interest rate.

Prepare a new int[] variable and inititialize it : Prepare a new int[] variable and inititialize it to be a new int array with the given size to create random values use the random class import javautil.random inside the method create a new instance with: Random rand = new Random();

What is a data model and what is it purpose : What is a data model and what is it purpose and what is a prototype and what is its purpose - What is a use case, and what is its purpose?

Can you find the element of an array : We would like to determine whether a given array A has a majority element, and if so, find the element.

Prepare a program that takes the data from triangle : Prepare a program that takes the data from triangle.txt (supplied in this folder) and outputs a message indicating whether the triangle is a right triangle. The text file has data for three triangles.

Explain exothermic reaction that is nonspontaneous : Question- Which of the following is consistent with an exothermic reaction that is nonspontaneous at high temperatures?

Iron(iii) ion with three c2o42- ions attached as ligands : Question- A compound contains a transition metal coordination complex. This coordination complex consists of one iron(III) ion with three C2O42- ions attached as ligands. Which formula below describes a compound that fits this description?

User Account

All Pages