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 these constraints: NOT NULL constraints correspond to cardinalities on the diagram above. Foreign key actions are SET NULL for delete rules and CASCADE for update rules. Specify a suitable column as the phone table primary key.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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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 these constraints:

NOT NULL constraints correspond to cardinalities on the diagram above.
Foreign key actions are SET NULL for delete rules and CASCADE for update rules.
Specify a suitable column as the phone table primary key.

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