Maurice Tutor

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Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 405 Weeks Ago, 5 Days Ago
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Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

Experience

  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 15 Oct 2017 My Price 4.00

relational schema.

Consider the following relational schema. Students(rollno: integer, sname: string) Courses(courseno: integer, cname: string) Registration(rollno: integer, courseno: integer, percent: real) Which of the following queries are equivalent to this query in English? “Find the distinct names of all students who score more than 90% in the course numbered 107”(I) SELECT DISTINCT S.sname FROM Students as S, Registration as R WHERE R.rollno=S.rollno AND R.courseno=107 AND R.percent >90(II) ?sname(scourseno=107 ? percent>90 (Registration ? Students))(III) {T | ?S?Students, ?R?Registration ( S.rollno=R.rollno ? R.courseno=107 ? R.percent>90 ?T.sname=S.sname)}(IV) { | ?SR?RP ( ?Students ? ?Registration ? RP>90)}</sr,></sr,>(A) I, II, III and IV</sr,></sr,>(B) I, II and III only</sr,></sr,>(C) I, II and IV only</sr,></sr,>(D) II, III and IV only</sr,></sr,>

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Maurice Tutor
(5)
Status NEW Posted 15 Oct 2017 09:10 AM My Price 4.00

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