Database Systems: Design, Implementation, Management, Loose-leaf Version
12th Edition
ISBN: 9781305866799
Author: Coronel, Carlos; Morris, Steven
Publisher: Course Technology
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Chapter 11, Problem 27P
Program Plan Intro
Factor that are to be considered in writing the conditional expression:
- It is recommended to use simple column or literal as operands in a conditional expression.
- Numeric comparisons are made faster when compared with the characters, date and null characters.
- Equality expression will be processed in a faster rate when compared with inequality expressions.
- Use literals in place of the conditional expressions.
- Specify False condition first when multiple AND condition is used.
- Specify True condition first when multiple OR condition is used.
- Usage of NOT logical operation is avoided.
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Chapter 11 Solutions
Database Systems: Design, Implementation, Management, Loose-leaf Version
Ch. 11 - Prob. 1RQCh. 11 - What index should you create? Write the required...Ch. 11 - What is the focus of most performance-tuning...Ch. 11 - What are database statistics, and why are they...Ch. 11 - How are database statistics obtained?Ch. 11 - What database statistics measurements are typical...Ch. 11 - How is the processing of SQL DDL statements (such...Ch. 11 - In simple terms, the DBMS processes a query in...Ch. 11 - If indexes are so important, why not index every...Ch. 11 - What is the difference between a rule-based...
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