If you were about to create an index on a relation, what considerations would guide your choice?
Question:
1. The choice of primary index.
2. Clustered versus unclustered indexes.
3. Hash versus tree indexes.
4. The use of a sorted file rather than a tree-based index.
5. Choice of search key for the index. What is a composite search key, and what considerations are made in choosing composite search keys? What are index-only plans, and what is the influence of potential index-only evaluation plans on the choice of search key for an index?
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1 The choice of the primary key is made based on the semantics of the data If we need to retrieve records based on the value of the primary key as is ...View the full answer
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Related Book For 
Database management systems
ISBN: 978-0072465631
3rd edition
Authors: Raghu Ramakrishan, Johannes Gehrke, Scott Selikoff
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