Sams Teach Yourself SQL in 24 Hours
- Table of Contents
- Copyright
- About the Authors
- Acknowledgments
- Tell Us What You Think!
- Introduction
- Part I: A SQL Concepts Overview
- Hour 1. Welcome to the World of SQL
- Part II: Building Your Database
- Hour 2. Defining Data Structures
- Hour 3. Managing Database Objects
- Hour 4. The Normalization Process
- Hour 5. Manipulating Data
- Hour 6. Managing Database Transactions
- Part III: Getting Effective Results from Queries
- Hour 7. Introduction to the Database Query
- Hour 8. Using Operators to Categorize Data
- Hour 9. Summarizing Data Results from a Query
- Hour 10. Sorting and Grouping Data
- Hour 11. Restructuring the Appearance of Data
- Hour 12. Understanding Dates and Times
- Part IV: Building Sophisticated Database Queries
- Hour 13. Joining Tables in Queries
- Hour 14. Using Subqueries to Define Unknown Data
- Hour 15. Combining Multiple Queries into One
- Part V: SQL Performance Tuning
- Hour 16. Using Indexes to Improve Performance
- Hour 17. Improving Database Performance
- Part VI: Using SQL to Manage Users and Security
- Hour 18. Managing Database Users
- Hour 19. Managing Database Security
- Part VII: Summarized Data Structures
- Hour 20. Creating and Using Views and Synonyms
- Hour 21. Working with the System Catalog
- Part VIII: Applying SQL Fundamentals in Today's World
- Hour 22. Advanced SQL Topics
- Hour 23. Extending SQL to the Enterprise, the Internet, and the Intranet
- Hour 24. Extensions to Standard SQL
- Part IX: Appendixes
- Appendix A. Common SQL Commands
- Appendix B. Using MySQL for Exercises
- Appendix C. Answers to Quizzes and Exercises
- Appendix D. CREATE TABLE Statements for Book Examples
- Appendix E. INSERT Statements for Data in Book Examples
- Appendix F. Glossary
- Appendix G. Bonus Exercises
Database Tuning Versus SQL Tuning
Before continuing with your SQL statement tuning lesson, it is important to understand the difference between tuning a database and tuning the SQL statements that access the database.
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Database tuning is the process of tuning the actual database, which encompasses the allocated memory, disk usage, CPU, I/O, and underlying database processes. Tuning a database also involves the management and manipulation of the database structure itself, such as the design and layout of tables and indexes. Additionally, database tuning often involves the modification of the database architecture in order to optimize the use of the hardware resources available. There are many other considerations when tuning a database, but these tasks are normally accomplished by the database administrator. The objective of database tuning is to ensure that the database has been designed in a way that best accommodates expected activity within the database. |
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SQL tuning is the process of tuning the SQL statements that access the database. These SQL statements include database queries and transactional operations such as inserts, updates, and deletes. The objective of SQL statement tuning is to formulate statements that most effectively access the database in its current state, taking advantage of database and system resources and indexes. |
Formatting Your SQL Statement | Next Section
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