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. 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 |
|
|