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Chapter 6. The DB2 Optimizer

This chapter discusses the different strategies that the DB2 optimizer takes when a query is presented to it and how we should analyze and interpret the choices that the DB2 optimizer makes.



    		IBM Press Series?Information Management
    		About Prentice Hall Professional Technical Reference
    		Foreword
    		Preface
    		Chapter 1. Data Storage
    		Chapter 2. Data Manipulation
    		Chapter 3. Database Availability
    		Chapter 4. Database Security
    		Chapter 5. Multi-Dimensional Clustering
    		Chapter 6. The DB2 Optimizer
    		Joining in DB2 UDB
    		Materialized Query Tables
    		Understanding DB2 Query Access Plans
    		Summary
    		Chapter 7. Federated Database Access
    		Chapter 8. Performance Tuning
    		Chapter 9. Database Communications
    		Chapter 10. Performance Tuning Examples
    		Appendix A. Useful DB2 Commands
    		Appendix B. parseSQL.pl
    		Appendix C. exfmtDIF.pl
    		Appendix D. Comparing Index Advisor Recommended Indexes with Existing Indexes
    		Appendix E. Configuration Parameters That Can Be Changed Online
    		Appendix F. Explain Tools
    		Appendix G. Starting and Stopping a DB2 Instance
    		Appendix H. LDAP Integration in DB2 UDB Using Microsoft Active Directory
    		Appendix I. Tuning DB2 UDB in the IBM LDAP Environment
    		Appendix J. DB2 Support Information
    		Appendix K. DB2 Connect Implementation
    		Appendix L. Sample Questions
    		Appendix M. Answers to Sample Questions
    		About the CD-ROM
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