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, 5 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 22 Sep 2017 My Price 7.00

index matches

Consider the following schema with the Sailors relation:

Sailors(sid: integer, sname: string, rating: integer, age: real)

For each of the following indexes, list whether the index matches the given selection conditions. If there is a match, list the primary conjuncts.

1. A B+-tree index on the search key [ Sailors.sid ].

(a) σSailors.sid<50,000(Sailors)

(b) σSailors.sid=50,000(Sailors)

2. A hash index on the search key _ Sailors.sid _.

(a) σSailors.sid<50,000(Sailors)

(b) σSailors.sid=50,000(Sailors)

3. A B+-tree index on the search key _ Sailors.sid, Sailors.age _.

(a) σSailors.sid<50,000∧Sailors.age=21(Sailors)

(b) σSailors.sid=50,000∧Sailors.age>21(Sailors)

(c) σSailors.sid=50,000(Sailors)

(d) σSailors.age=21(Sailors)

4. A hash-tree index on the search key _ Sailors.sid, Sailors.age _.

(a) σSailors.sid=50,000∧Sailors.age=21(Sailors)

(b) σSailors.sid=50,000∧Sailors.age>21(Sailors)

(c) σSailors.sid=50,000(Sailors)

(d) σSailors.age=21(Sailors)

Answers

Maurice Tutor
(5)
Status NEW Posted 22 Sep 2017 09:09 PM My Price 7.00

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)