Database System Concepts
7th Edition
ISBN: 9781260084504
Author: Abraham Silberschatz, S. Sudarshan, Abraham, Henry Korth, Silberschatz Abraham, Silberschatz Professor
Publisher: McGraw-Hill Education
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Chapter 22, Problem 10PE
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Performing a join:
- Considered a cloud data storage is used to store the given two relations.
- Performing a join to the two relations r and s;
- Considering cloud data storage, joins are considered to be very expensive when the relation r or s needs to be partitioned based on the attributes other than the join attributes.
- It is because large amount of data needs to be transferred to perform a join operation.
- The join is retained to be a materialized view,
- The join can be updated at a low cost as and when the relation r or s is updated instead of making a huge cost instead of making huge cost when a query is executing...
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