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Category > Computer Science Posted 28 Jul 2017 My Price 7.00

enrollment database schema

Exercise  16.7  Consider the university enrollment database  schema:

 

Student(snurn: integer, snarne: string, majoT: string, level: string,  age:  integer) Class( name:  string, meets_at: time,   string,   integer)

Enrolled(snum:  integer,  cname: string)

Faculty (fid:   integer, fname:  string,  deptid:  integer)

 

The meaning of these relations is straightforward; for example, Enrolled has one record per student-class  pair such that  the  student is  enrolled  in  the   class.

 

For each of the following transactions, state the SQL isolation level you would use and explain why you  chose it.

 

1.    Enroll a student identified by her snum into the class named 'Introduction to Database Systems'.

2.    Change enrollment for a student identified by her snum from one class to another class,

3.    Assign a new faculty member identified by his fid to the class with the least number of students.

4.    For each class, show the number of students enrolled in the class.

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Maurice Tutor
(5)
Status NEW Posted 28 Jul 2017 11:07 AM My Price 7.00

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