Question2: Knowing the relational schema of the Company database: 1. Write a relational algebra query to derive the new relation: EMP_DEP=(ENAME, SSN, BDATA, ADDRESS, DNAME, DMGRSNN) 2. Populate your new relation with at least 5 entries, 3. Discuss insertion, deletion and modification anomalies.

Question2: Knowing the relational schema of the Company database: 1. Write a relational algebra query to derive the new relation: EMP_DEP=(ENAME, SSN, BDATA, ADDRESS, DNAME, DMGRSNN) 2. Populate your new relation with at least 5 entries, 3. Discuss insertion, deletion and modification anomalies.

A Guide to SQL

9th Edition

ISBN:9781111527273

Author:Philip J. Pratt

Publisher:Philip J. Pratt

Chapter2: Database Design Fundamentals

Section: Chapter Questions

Problem 5RQ: What is a relation?

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What is a relation?
Implement a new independent entity phone in the Sakila database. Attributes and relationships are shown in the following diagram: The diagram uses Sakila naming conventions. Follow the Sakila conventions for your table and column names: All lower case Underscore separator between root and suffix Foreign keys have the same name as referenced primary key Write CREATE TABLE and ALTER TABLE statements that: Implement the entity as a new phone table. Implement the has relationships as foreign keys in the Sakila customer, staff, and store tables. Remove the existing phone column from the Sakila address table. Step 2 requires adding a foreign key constraint to an existing table. Ex: ALTER TABLE customer ADD FOREIGN KEY (phone_id) REFERENCES phone(phone_id) ON DELETE SET NULL ON UPDATE CASCADE; Specify data types as follows: phone_id, phone_number, and country_code have data type INT. phone_type has date type VARCHAR(12) and contains strings like 'Home', 'Mobile', and 'Other'. Apply…
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Implement a new independent entity phone in the Sakila database. Attributes and relationships are shown in the following diagram: The diagram uses Sakila naming conventions. Follow the Sakila conventions for your table and column names: All lower case Underscore separator between root and suffix Foreign keys have the same name as referenced primary key Write CREATE TABLE and ALTER TABLE statements that: Implement the entity as a new phone table. Implement the has relationships as foreign keys in the Sakila customer, staff, and store tables. Remove the existing phone column from the Sakila address table. Step 2 requires adding a foreign key constraint to an existing table. Ex: ALTER TABLE customer ADD FOREIGN KEY (phone_id) REFERENCES phone(phone_id) ON DELETE SET NULL ON UPDATE CASCADE; Specify data types as follows: phone_id, phone_number, and country_code have data type INT. phone_type has date type VARCHAR(12) and contains strings like 'Home', 'Mobile', and 'Other'. Apply…
slotion for problem no-53 of book- Database Systems: Design, Implementation, and Management, 13th Edition, by Carlos Coronel and Steven Morris
Assignment III (5%): Design of the conceptual model (ERD) from the given relational database. (Note: students has to give appropriate labels on relationships and type of relationships between the entities) Use the same Assignment- I schema to perform the PL/SQL programs Q1. The management of the organization has decided to increase the salaries of all employees to 15% for this, write a PL/SQL block to accept the employee number and to update the salary of that employee. Display the output based on the existing records of the employees. (2 marks) Q2. having the employee age above 40 years. (2 marks) Create a PL/SQL a cursor program that will increase the employee salary to 25% who are Q3. where place belongs to Ibri, dunk or Yanul (hint: Project (projectID. projectName, place, start Year, end Year, #DepartmentID) (2 marks) Write a PL/SQL procedure to change the name of the project to "AL Dahariyah Projects"
Explain how referential integrity is represented in relational model? Enter your answer here
Implement a new independent entity phone in the Sakila database. Attributes and relationships are shown in the diagram below The diagram uses Sakila naming conventions. Follow the Sakila conventions for your table and column names: All lower case Underscore separator between root and suffix Foreign keys have the same name as referenced primary key Write CREATE TABLE and ALTER TABLE statements that: Implement the entity as a new phone table. Implement the has relationships as foreign keys in the Sakila customer, staff, and store tables. Remove the existing phone column from the Sakila address table. Step 2 requires adding a foreign key constraint to an existing table. Ex: ALTER TABLE customer ADD FOREIGN KEY (phone_id) REFERENCES phone(phone_id) ON DELETE SET NULL ON UPDATE CASCADE; Specify data types as follows: phone_id, phone_number, and country_code have data type INT. phone_type has date type VARCHAR(12) and contains strings like 'Home', 'Mobile', and 'Other'. Apply these…
Explain how referential integrity is represented in relational model?
32. In a relational model, relations are termed as a. Tuples b. Attributes c. Rows d. Tables
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