
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Give a normalized version of the Index_metadata relation, and explain why
using the normalized version would result in worse performance.
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- What sets a clustered index apart from a sparse one, and how does one go about making one?arrow_forwardLet's pretend that there's only room for one student in a class and two people want to sign up for it. Which aspect of a database prevents both students from being assigned the last open seat?arrow_forwardWhen you mention "metadata," what exactly do you mean? In the context of a dataset, what exactly is metadata? Does a result set's information come in use at any point?arrow_forward
- How does one go about making a clustered index, and what are the primary distinctions between a clustered index and a sparse index?arrow_forwardThis piece explains why using a normalised version of the Index information link may lead to poor performance.arrow_forwardIf you mention "metadata," what exactly do you mean? Within the context of a data set, metadata is defined as follows: When may it be useful to use metadata extracted from a result set?arrow_forward
- How is a clustered index made, and what are the main differences between a clustered index and a sparse index?arrow_forwardThe DBA denormalized certain data in the TAL Distributors database to improve speed, and one of the resultant tables looks like this: It has been determined that the Customer table is not in third normal form due to one or more of the following fields: CustomerNum, CustomerName, Street, City, State, PostalCode, Balance, CreditLimit, RepNum, or RepName. In this scenario, what is the normal form of the denormalized table?arrow_forwardKeeping the join as a materialized view may be handy if a parallel data store is utilized to hold two relations r and s and we need to connect them. In terms of total throughput, space use, and response time to user requests, what are the advantages and costs of this approach?arrow_forward
- In comparison to a sparse index, what is the advantage of a clustered index?arrow_forwardWhat distinguishes a clustered index from a sparse one, how is one to create one, and how is one to use it?arrow_forwardHow is a clustered index created, and what characteristics distinguish it from a sparse index?arrow_forward
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