Draw the Entity Relationship (E-R) diagram from the following relations: Employee (EmployID, FirstName, LastName, SSF, Gender, Department) Contact (PhoneNo, EmployID, EmailAddress, SkypeID, DigitalAddress, PostalAddress) Department (DeptID, EmployID, DeptName, DeptHead) explaining the symbols used. b) State all possible primary keys and foreign key from the relations above. c) Deduce if any, derived attributes from the diagram.

Draw the Entity Relationship (E-R) diagram from the following relations: Employee (EmployID, FirstName, LastName, SSF, Gender, Department) Contact (PhoneNo, EmployID, EmailAddress, SkypeID, DigitalAddress, PostalAddress) Department (DeptID, EmployID, DeptName, DeptHead) explaining the symbols used. b) State all possible primary keys and foreign key from the relations above. c) Deduce if any, derived attributes from the diagram.

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter1: Overview Of Database Concepts

Section: Chapter Questions

Problem 3MC

See similar textbooks

Similar questions

Use Lucidchart to draw an ERR Diagram with this information: EER Diagram for Royal Victoria Hospital Information System Assumptions: The diagram focuses on the entities and relationships. Attributes with cardinality are assumed to be single-valued. Dates are assumed as identifiers for visits. Entities: Person: (person_ID, name, address, birth_date, phone_number) Employee: (inherits from Person, date_hired) Nurse: (inherits from Employee, certificate) Staff: (inherits from Employee, job_class) Technician: (inherits from Employee, skill) Physician: (inherits from Person, speciality, pager_number) Patient: (inherits from Person, contact_date, resident_flag) Outpatient: (inherits from Patient) Resident: (inherits from Patient) Visit: (date, comments, outpatient_ID) Care Centre: (name, location) Laboratory: (name, location) Bed: (bed_number, room_number, care_centre_ID) Item: (item_number, description, unit_cost) Treatment:…
b. Draw an Entity Relationship diagram from each of the following descriptions. Include the attributes, primary keys (underlines) and the relationships in the diagram (like relationship in Access). i. Each of the department has many employees assigned to it, but each employee works for only one department. if. A customer can rent many videotapes from the video store. Each of the videotapes can be rented to many customers.
18. Refer to this entity-relationship diagram. How does this diagram depict a unattractive relationship rather than a binary relationship. A: The entity types back each other up B: the salesperson have the same commission percentage C: the entity types are the same for each D: the salesperson have the same year of hire
Draw an ER-Diagram for this situation and place minimum and maximum cardinalities on the diagram? Entity type: • EMPLOYEE with attribute: EmpID , Name (Firstname :besan, Lname) , Address :Amman, Birth_of_Date25/5/02 . • DEPARTMENT with attribute : DeptID , DeptName , Loc Relationship: Works_in Relationship between EMPLOYEE and DEPARTMENT and each employee is works in zero or many department and each department worked by one or many employee.
Draw this ER Diagram, but note that: Ths diagram should adhere to compressed Chen notation : The ER diagram consists of four entities: Pet, Challenge, User, and Vote. The Pet entity has attributes such as id (primary key), name, species, age, and description to store information about each pet profile. The Challenge entity has attributes such as id (primary key), pet1_id and pet2_id (foreign keys referencing the Pet entity), start_date, end_date, and likes to store information about each challenge between two pets. The User entity has attributes such as id (primary key), name, and email to store information about users who participate in voting and challenge creation. The Vote entity has attributes such as id (primary key), challenge_id (foreign key referencing the Challenge entity), user_id (foreign key referencing the User entity), and vote to store information about user's vote for a particular challenge.
draw an E-R diagram that indicates the entity sets and their attributes. Identify and label significant relationship sets between pairs of entities, the degree of relationship sets and the cardinality and participation constraints.
Provide an Entity-Relationship Model for a motor sport fan, based onthe description in Table 1 on the next page.Present the model in the form of an Entity-Relationship diagram inChen notation. Make sure to identify special attributes (includingkeys) in the diagram and include participation and cardinality con-straint annotations for your relationships.
1) Add a couple of attributes (including Primary keys) to each entity set. 2) Use Reification to transform it into a diagram with only binary relationships.
Analyze the given entity relationship diagram and answer the following questions. What is the degree of “has” relationship? Identify primary key(s) Identify the category of each attribute Name the cardinalities
Use ER Assistant to draw your diagram. Draw a self-referencing entity type for the Employee entity type for which an employee is supervised by a maximum of one other employee and doesn’t have to be supervised by any employee at all. Conversely, an employee can supervise zero or many other employees. The attributes of the Employee entity are as follows: EmpNo (primary key), EmpName, EmpAddress.
An entity in X is connected numerous entity in Y, however an entity in Y is associated to only one entity in X. What it the type of relationship? Select one: a. One to many b. One to One c. None d. Many to Many
Creation of Entity Relationship Diagram Draw the entity relationship diagram (ERD) for this information.