Please see the attached file for the actual assignment. It has the images.The following ER

Please see the attached file for the actual assignment. It has the images.

The following ER Diagram represents the data model for a maritime system that will track the movements of ships visiting ports and their home ports 

(1) Create a relational schema .  (listing of table structure with attributes that includes specification of keys and lines+arrows addressing foreign keys) for this data model

(2) Write the create table statements in SQL with propto1 er syntax 5 points] (make assumptions about data types, make sure to include keys/foreign keys, think carefully about how to handle the weak entity and the many many relationship) 

(3) Provide a definition or answer: 

(A) From a database perspective, data can be classified into two types: atomic and compound. a. Define atomic  b. Define compound   

(B) If a relation A has 4 attributes (hence degree 4) and 7 tuples, and relation B has 3 attributes and 5 tuples what is the degree and size of A X B?  

(C) Define Primary Key:    

(D) Define Foreign Key: 

(4)   (10 points) For the relation:   

What is a valid (composite, candidate) key?     

Explain in writing why it is a valid key and why other choices are not:         

(5)   (10 pts) Describe at least 3 different type of JOINs and how they differ.   

(6)  (15 pts)  Given relation Table1(A,B,C):      And relation Table2(A,B,C):             4 (A) Provide the relation for Table1  ? Table2:       4 (B) Provide the relation for Table1  – Table2:       4 (C) Compute (Table1  – Table2)   ?  (Table2  – Table1), often called the “symmetric difference” of Table1 and Table2.      A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 A B C 2 5 3 2 5 4 4 5 6 1 2 3 5)  (8 pts) Based on the tables below, provide the relation for TableB  ÷ TableA: TableA PNO Desc 8 Rachet & Socket 10 Hammer 14 Screwdriver  TableB Emp PNO Desc John 8 Rachet & Socket John 10 Hammer Bill 14 Screwdriver Mary 10 Hammer Mary 14 Screwdriver Bill 8 Rachet & Socket John 14 Screwdriver Mary 12 Saw 6) (1 pts ) Write a series of relational algebra statements 2 pizza SQL database we looked at that that based on the relations in will implement: “Find the names of all people who eat at least one pizza served by the Little Caesars not frequent Little Caesar s . ” but who do not frequent Little Caesar s . ”

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