Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Consider the schema with the Sailors relation: Sailors(sid: integer sname: string, rating: integer, age: real) Assume that each tuple of Sailors is 50 bytes long,

Consider the schema with the Sailors relation:

image text in transcribed

Sailors(sid: integer sname: string, rating: integer, age: real) Assume that each tuple of Sailors is 50 bytes long, that a page can hold 80 Sailors tuples, and that we have 500 pages of such tuples. For each of the following selection conditions, estimate the number of pages retrieved, given the catalog information in the question l. Assume that we have a B+-tree index T on the search key ( Sailors.sid ), and assume that IHeight(T)-4, INPages(T)-50, Low(7)- and High(T) 100,000. (a) aSailors. 'id

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

More Books

Students also viewed these Databases questions

Question

Define and discuss the process of planned change.

Answered: 1 week ago

Question

3 The distinction between microeconomics and macroeconomics.

Answered: 1 week ago