Maurice Tutor

(5)

$15/per page/Negotiable

About Maurice Tutor

Levels Tought:
Elementary,Middle School,High School,College,University,PHD

Expertise:
Algebra,Applied Sciences See all
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: 398 Weeks Ago, 3 Days Ago
Questions Answered: 66690
Tutorials Posted: 66688

Education

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

Experience

  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 15 Sep 2017 My Price 5.00

parse tree constructed

Show the parse tree constructed for each of the following three queries. Then, for each parse tree, convert it into a logical query tree. Explain your mapping to a logical query tree. Do not perform any optimization on the logical query tree at this time. That is, give the canonical query tree before optimization. The database schema is below:

 

 

a)

SELECT name FROM student WHERE major = 'CS'


b)

SELECT name, major FROM Student, Enrolled, Class, Faculty WHERE facultyId = fid AND studentId = sid AND className = cname AND fname = 'Jones'

c)

SELECT fname FROM Faculty WHERE deptid = '22C' AND fid IN (SELECT facultyId FROM Class WHERE room = 'MLH 110')

Answers

Maurice Tutor
(5)
Status NEW Posted 15 Sep 2017 02:09 PM My Price 5.00

Hel-----------lo -----------Sir-----------/Ma-----------dam-----------Tha-----------nk -----------You----------- fo-----------r u-----------sin-----------g o-----------ur -----------web-----------sit-----------e a-----------nd -----------and----------- ac-----------qui-----------sit-----------ion----------- of----------- my----------- po-----------ste-----------d s-----------olu-----------tio-----------n.P-----------lea-----------se -----------pin-----------g m-----------e o-----------n c-----------hat----------- I -----------am -----------onl-----------ine----------- or----------- in-----------box----------- me----------- a -----------mes-----------sag-----------e I----------- wi-----------ll

Not Rated(0)