Write an efficient relational algebra expression for the sql


Write an efficient relational algebra expression for the following SQL query:
SELECT lastName, firstName, grade
FROM Student, Enroll, Class, Faculty
WHERE facName = 'Tanaka' AND schedule='MTHF12' AND
Class.classNumber = Enroll.classNumber AND
Faculty. facId = Class.facId AND
Student.stuId = Enroll.stuId; 

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PL-SQL Programming: Write an efficient relational algebra expression for the sql
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