Tutorial: Sql tuning

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Sql tuning

Preface Objectives of This Book Structure of This Book Conventions Used in This Book Chapter 1. Introduction 1.1 Why Tune SQL? 1.2 Who Should Tune SQL? 1.3 How This Book Can Help 1.4 A Bonus 1.5 Outside-the-Box Solutions Chapter 2. Data-Access Basics 2.1 Caching in the Database 2.2 Tables 2.3 Indexes 2.4 Uncommon Database Objects 2.5 Single-Table Access Paths 2.6 Calculating Selectivity 2.7 Joins Chapter 3. Viewing and Interpreting Execution Plans 3.1 Reading Oracle Execution Plans 3.2 Reading DB2 Execution Plans 3.3 Reading SQL Server Execution Plans Chapter 4. Controlling Execution Plans 4.1 Universal Techniques for Controlling Plans 4.2 Controlling Plans on Oracle 4.3 Controlling Plans on DB2 4.4 Controlling Plans on SQL Server Chapter 5. Diagramming Simple SQL Queries 5.1 Why a New Method? 5.2 Full Query Diagrams 5.3 Interpreting Query Diagrams 5.4 Simplified Query Diagrams 5.5 Exercises (See Section A.1 for the solution to each exercise.) Chapter 6. Deducing the Best Execution Plan 6.1 Robust Execution Plans 6.2 Standard Heuristic Join Order 6.3 Simple Examples 6.4 A Special Case 6.5 A Complex Example 6.6 Special Rules for Special Cases 6.7 Exercise (See Section A.2 for the solution to the exercise.) Chapter 7. Diagramming and Tuning Complex SQL Queries 7.1 Abnormal Join Diagrams 7.2 Queries with Subqueries 7.3 Queries with Views 7.4 Queries with Set Operations 7.5 Exercise (See Section A.3 for the solution to the exercise.) Chapter 8. Why the Diagramming Method Works 8.1 The Case for Nested Loops 8.2 Choosing the Driving Table 8.3 Choosing the Next Table to Join 8.4 Summary Chapter 9. Special Cases 9.1 Outer Joins 9.2 Merged Join and Filter Indexes 9.3 Missing Indexes 9.4 Unfiltered Joins 9.5 Unsolvable Problems Chapter 10. Outside-the-Box Solutions to Seemingly Unsolvable Problems 10.1 When Very Fast Is Not Fast Enough 10.2 Queries that Return Data from Too Many Rows 10.3 Tuned Queries that Return Few Rows, Slowly Appendix A. Exercise Solutions A.1 Chapter 5 Exercise Solutions A.2 Chapter 6 Exercise Solution A.3 Chapter 7 Exercise Solution Appendix B. The Full Process, End to End B.1 Reducing the Query to a Query Diagram B.2 Solving the Query Diagram B.3 Checking the Execution Plans B.4 Altering the Database to Enable the Best Plan B.5 Altering the SQL to Enable the Best Plan B.6 Altering the Application B.7 Putting the Example in Perspective Glossary