Question: Assume the School database shown an the Appendix. Write the foliowing quenes in ( 1 ) telational algebra and ( 2 ) SQL . State

Assume the School database shown an the Appendix. Write the foliowing quenes in (1) telational algebra and (2) SQL. State your asoumptions if the semratics air not cleas. COURSES(courst id coerst_fame, coure_description, crediss, departmet_code) EVROL I MENTS(studrm_id, coerve id, semelter, grade) MAJORS(major_code, major_aame, department_code) DEPARTMENTS(dejustern code, depatment_mene)
(a) Fisd the names of all stadents who havie sat taken any courses. (12)
(b) Find the course mames ind the namber of stadents who lave taken each coorsw, warted by ber mumber of itudents in descrealing order. (12 poents)
(c) Find the average grade for the "Database Management Syucess" coure (I2poista)
Assume the School database shown an the Appendix.

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