Computer Science
1
read chapters 2 and 3 textbook and review reputable IGU online library resources and journals and discuss: Advantages and Disadvantages of Relational Model.
2
read chapter 3 and reputable journals/articles and IGU online library resources and describe the following relational operators: Union, Project, Intersect and Join. Please provide a real-world application example for each of these operators.
3
read chapter 3 of textbook and review reputable IGU online library resources and journals and discuss:
What does it mean to say that a database displays both entity integrity and referential integrity? And why entity integrity and referential integrity important in a database? Provide an application example to support your discussion.
100 points
type your answers on this document and submit this document.
1. Suppose that you are using the Database composed of the two tables shown in the following
figure. Use these tables to answer part A,B,C (40 points)
Theater Database Tables
Identify the primary keys for each table. ( 15 points )
Identify the foreign key. ( 15 points )
What is the relationship between these 2 tables? (10 points)
Use the following Tables to answer questions A-C . ( 60 Total points )
PRODUCT and vendor Database Tables
For each table, identify the primary key and the foreign key(s). If a table does
not have a foreign key, write None in the assigned space. ( 20 points )
TABLE
PRIMARY KEY
FOREIGN KEY(S)
PRODUCT
VENDOR
Do the tables exhibit entity integrity? Answer Yes or No, and then explain
your answer. ( 20 points )
TABLE
ENTITY INTEGRITY?
Type Yes or No here
EXPLANATION
Explain the reason here
PRODUCT
VENDOR
Do the tables exhibit referential integrity? Answer Yes or No, and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key. ( 20 points )
TABLE
REFERENTIAL INTEGRITY
EXPLANATION
PRODUCT
VENDOR
