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Given the following query, which is represented by a relational algebra expression: Project[Bill Amount, Withdrawal Amount]( Select( Withdrawal date=6/19/2019,   Join(Account,Account,Account.rid=Account.rid ))) All tables are arranged by key. It assumes that we have defined B+ trees on the Account.rid and Withdrawal.date attributes. Our database management system uses the following algorithms to implement contacts: a) contact with nested loop and index and b) contact with sorting and merging. Which contact implementation algorithm reads the fewest blocks from disk? How many blocks does it read? You can only make a rough estimate of the blocks read for the given algorithms.

Given the following query, which is represented by a relational algebra expression: Project[Bill Amount, Withdrawal Amount]( Select( Withdrawal date=6/19/2019,   Join(Account,Account,Account.rid=Account.rid ))) All tables are arranged by key. It assumes that we have defined B+ trees on the Account.rid and Withdrawal.date attributes. Our database management system uses the following algorithms to implement contacts: a) contact with nested loop and index and b) contact with sorting and merging. Which contact implementation algorithm reads the fewest blocks from disk? How many blocks does it read? You can only make a rough estimate of the blocks read for the given algorithms.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Given the following query, which is represented by a relational algebra expression:
Project[Bill Amount, Withdrawal Amount](
Select( Withdrawal date=6/19/2019,
  Join(Account,Account,Account.rid=Account.rid )))
All tables are arranged by key. It assumes that we have defined B+ trees on the Account.rid and Withdrawal.date attributes. Our database management system uses the following algorithms to implement contacts:
a) contact with nested loop and index and
b) contact with sorting and merging.
Which contact implementation algorithm reads the fewest blocks from disk? How many blocks does it read? You can only make a rough estimate of the blocks read for the given algorithms.

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