CIPD QUESTIONS

Database Systems Design

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Written Assignment (Homework) #2

(10-point) Convert the following ER diagram into a relational database schema:

NOTE : I have uploaded the diagram for you

(90-point) Express the following queries on the above schema in both relational algebra (20-point each) and relational calculus (10-point each):

Find names of all students who take at least two courses taught by Peterson but take only one course from Davidson.
Find S_IDs of the students who take all courses taught by Davidson.
Find all instructors (C_InstNames) who currently teach at least three courses.

Please submit legible answers.

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Database Systems Design

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