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商品描述
The Definitive Solutions-Oriented Guide to IBM® DB2® for z/OS®: Now Fully Updated for Both v9 and v10!
The largest database tuning performance gains can often be obtained from tuning application code, and applications that use SQL to retrieve data are the best candidates for tuning. This well-organized, easy-to-understand reference brings together more than 100 SQL-related skills and techniques that any developer can use to build and optimize DB2 applications for consistently superior performance.
DB2 tuning expert Tony Andrews (“Tony the Tuner”) draws on more than 20 years of DB2-related experience, empowering you to take performance into your own hands, whether you’re writing new software or tuning existing systems. Tony shows you exactly how to clear bottlenecks, resolve problems, and improve both speed and reliability.
This book fully reflects the latest SQL programming best practices for DB2 V9 and DB2 V10 on z/OS: techniques that are taught in no other book and are rarely covered in general DB2 SQL courses. Drawing on his extensive consulting experience and highly praised training with Themis Inc., Tony also presents practical checklists and an invaluable 15-step methodology for optimizing virtually any DB2 application.
Coverage includes
The largest database tuning performance gains can often be obtained from tuning application code, and applications that use SQL to retrieve data are the best candidates for tuning. This well-organized, easy-to-understand reference brings together more than 100 SQL-related skills and techniques that any developer can use to build and optimize DB2 applications for consistently superior performance.
DB2 tuning expert Tony Andrews (“Tony the Tuner”) draws on more than 20 years of DB2-related experience, empowering you to take performance into your own hands, whether you’re writing new software or tuning existing systems. Tony shows you exactly how to clear bottlenecks, resolve problems, and improve both speed and reliability.
This book fully reflects the latest SQL programming best practices for DB2 V9 and DB2 V10 on z/OS: techniques that are taught in no other book and are rarely covered in general DB2 SQL courses. Drawing on his extensive consulting experience and highly praised training with Themis Inc., Tony also presents practical checklists and an invaluable 15-step methodology for optimizing virtually any DB2 application.
Coverage includes
- Empowering developers on knowing what to do and where to look in resolving performance problems in queries or programs
- Providing many programming and SQL coding examples
- Establishing standards and guidelines that lead to high-performance SQL
- Implementing time-efficient code walkthroughs to ensure that your standards are followed
- Focusing on the small number of SQL statements that consume the most resources
- Identifying simple solutions that deliver the most sizable benefits
- Optimizing performance by rewriting query predicates more efficiently
- Providing a better understanding of SQL optimization and Runstat statistics
- Recognizing opportunities to tweak your code more effectively than the Optimizer
- Optimizing SQL code with COBOL applications
- Efficiently checking for the existence of data, rows, or tables
- Using Runstats’ newest capabilities to consistently optimize paths to data
商品描述(中文翻譯)
《IBM® DB2® for z/OS® 的權威解決方案導向指南：現在已全面更新至 v9 和 v10！》
最大的資料庫調優性能提升通常可以通過調整應用程式代碼來獲得，而使用 SQL 來檢索資料的應用程式是調優的最佳候選者。這本組織良好、易於理解的參考書匯集了超過 100 種與 SQL 相關的技能和技術，任何開發人員都可以使用這些技能來構建和優化 DB2 應用程式，以實現持續卓越的性能。
DB2 調優專家 Tony Andrews（“調優專家 Tony”）擁有超過 20 年的 DB2 相關經驗，讓您能夠掌握性能，無論您是在編寫新軟體還是調整現有系統。Tony 會詳細告訴您如何消除瓶頸、解決問題，並提高速度和可靠性。
本書充分反映了 DB2 V9 和 DB2 V10 在 z/OS 上的最新 SQL 程式設計最佳實踐：這些技術在其他書籍中未曾教授，且在一般的 DB2 SQL 課程中也很少涵蓋。Tony 還根據他豐富的顧問經驗和備受讚譽的 Themis Inc. 培訓，提供實用的檢查清單和一個無價的 15 步驟方法論，以優化幾乎任何 DB2 應用程式。
內容涵蓋：
- 使開發人員了解在查詢或程式中解決性能問題時應該做什麼和查看哪裡
- 提供許多程式設計和 SQL 編碼範例
- 建立導致高性能 SQL 的標準和指導方針
- 實施時間高效的代碼檢查，以確保遵循您的標準
- 專注於消耗最多資源的少數 SQL 語句
- 確定能夠帶來最大利益的簡單解決方案
- 通過更有效地重寫查詢條件來優化性能
- 提供對 SQL 優化和 Runstat 統計的更好理解
- 辨識出比優化器更有效地調整代碼的機會
- 與 COBOL 應用程式優化 SQL 代碼
- 高效檢查資料、行或表的存在性
- 使用 Runstats 的最新功能持續優化資料訪問路徑
