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List all the foreign key constraints among these relations

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Reference no: EM13507629

1.Consider the relations Students, Faculty, Courses, Rooms, Enrolled, Teaches, and Meets In de?ned in Section 1.5.2.

1a. List all the foreign key constraints among these relations.

1b. Give an example of a (plausible) constraint involving one or more of these relations that is not a primary key or foreign key constraint.

2. sid           name  login           age      gpa

 

    53831  Madayan     madayan@musi 11   1.8

     53832        Guldu      guldu@music   12 2.0     

Figure   Students with age < 18 on Instance S 

Consider the SQL query whose answer is shown in Figure  

1. Modify this query so that only the login column is included in the answer. 

2. If the clause WHERE S.gpa >= 2 is added to the original query, what is the set of tuples in the answer?

Reference no: EM13507629

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