Answered: 1) Does proper indexing make it…

1) Does proper indexing make it possible for some join queries to not need to retrieve a table entry at all to be used effectively in choosing results? True False

Programming with Microsoft Visual Basic 2017

8th Edition

ISBN:9781337102124

Author:Diane Zak

Publisher:Diane Zak

Chapter12: Database Queries With Sql

Section: Chapter Questions

Problem 1MQ2

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Question

1) Does proper indexing make it possible for some join queries to not need to retrieve a table entry at all to be used effectively in choosing results?

True

False

2) Which operation is a Hash based Index optimal for?

A) Range matching (ie x >= 10)

B) Pattern matching (ie x LIKE "Th%")

C) Equality matching (ie x = "This")

3) A Composite Search Key (ie WHERE age > 10 AND name = "Yossarian") can make use of which indexes with partially matching attribute lists?

(select all that apply)

A) Hash index of single key (ie age)

B) Hash index of multiple keys (ie age, name, gender)

C) B+ Tree index of a single key (ie age)

D) B+ Tree index of multiple keys (ie age, name, gender)

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