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商品描述
Write queries using little-known, but powerful, SQL features implemented in Oracle's database engine. You will be able to take advantage of Oracle’s power in implementing business logic, thereby maximizing return from your company’s investment in Oracle Database products.
Important features and aspects of SQL covered in this book include the model clause, row pattern matching, analytic and aggregate functions, and recursive subquery factoring, just to name a few. The focus is on implementing business logic in pure SQL, with a comparison of different approaches that can be used to write SELECT statements to return results that drive good decision making and competitive action in the marketplace.
This book covers features that are often not well known, and sometimes not implemented in competing products. Chapters on query transformation and logical execution order provide a grasp of the big picture in which the individual SQL features described in the other chapters are executed. Also included are a discussion on when to use the procedural capabilities from PL/SQL, and a series of examples showing different mixes of SQL features being applied in common types of queries that you are likely to encounter.
What You Will Learn
- Gain competitive advantage from Oracle SQL
- Know when to step up to PL/SQL versus staying in SQL
- Become familiar with query transformations and join mechanics
- Apply the model clause and analytic functions to business intelligence queries
- Make use of features that are specific to Oracle Database, such as row pattern matching
- Understand the pros and cons of different SQL approaches to solving common query tasks
- Traverse hierarchies using CONNECT BY and recursive subquery factoring
Who This Book Is For
Database programmers with some Oracle Database experience. The book is also for SQL developers who are moving to the Oracle Database platform or want to learn unique features of its query engine. Both audiences will learn to apply the full power of Oracle’s own SQL dialect to commonly encountered types of business questions and query challenges.
商品描述(中文翻譯)
使用Oracle的資料庫引擎，撰寫使用鮮為人知但功能強大的SQL特性的查詢。您將能夠充分利用Oracle在實現業務邏輯方面的優勢，從而最大限度地回報您公司對Oracle Database產品的投資。
本書涵蓋的SQL重要特性和方面包括模型子句、行模式匹配、分析和聚合函數以及遞歸子查詢分解等。重點是在純SQL中實現業務邏輯，並比較不同方法來撰寫SELECT語句以返回驅動良好決策和競爭行動的結果。
本書涵蓋了通常不太熟知且有時在競爭產品中未實現的特性。關於查詢轉換和邏輯執行順序的章節提供了對其他章節中描述的個別SQL特性的整體概念。還包括何時使用PL/SQL的程序能力的討論，以及一系列示例，展示了在常見類型的查詢中應用不同混合的SQL特性。
您將學到的內容包括：
- 從Oracle SQL中獲取競爭優勢
- 知道何時使用PL/SQL而不是保持在SQL中
- 熟悉查詢轉換和連接機制
- 將模型子句和分析函數應用於商業智能查詢
- 利用Oracle Database特有的功能，如行模式匹配
- 了解解決常見查詢任務的不同SQL方法的優缺點
- 使用CONNECT BY和遞歸子查詢分解遍歷層次結構
本書適合具有一些Oracle Database經驗的資料庫程式設計師。本書也適用於轉向Oracle Database平台或想要了解其查詢引擎獨特功能的SQL開發人員。兩個讀者群體都將學習如何應用Oracle自有的SQL方言來解決常見的業務問題和查詢挑戰。
