What is a disjoint subtype? Give an example. What is the difference between partial completeness and

What is a disjoint subtype? Give an example. What is the difference between partial completeness and
What is a disjoint subtype? Give an example. What is the difference between partial completeness and total completeness? Use the following diagram to answer question 3-5 . 4. According to the data model, is it required that every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why or why not? 5. Is it possible for a book to appear in the BOOK table without appearing in the PRODUCT table? Why or why not? 6. Given the following business scenario, create a Crow's Foot ERD using a specialization hierarchy if appropriate. TWO-Bit Drilling Company keeps information on employees and their insurance dependents. Each employee has an employee number, name, date of hire, and title. If an employee is an inspector, then the date of certifica and the rer wal date for that certification should also be recorded in the system. For all employees, the Social Security number and dependent names should be kept. All dependents must be associated with one and only one employee. Some employees will not have dependents, while others will have many dependents.   May 13 2022 05:24 PM

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