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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)
撰寫查詢，使用在 Oracle 資料庫引擎中實現的鮮為人知但強大的 SQL 功能。您將能夠利用 Oracle 的強大功能來實現業務邏輯，從而最大化公司對 Oracle Database 產品的投資回報。
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，以及遞迴子查詢因式分解等。重點在於使用純 SQL 實現業務邏輯，並比較不同的方法來撰寫 SELECT 語句，以返回能夠促進良好決策和市場競爭行動的結果。
本書涵蓋的功能通常不為人知，且有時在競爭產品中未實現。關於查詢轉換和邏輯執行順序的章節提供了對整體架構的理解，讓讀者了解其他章節中描述的各個 SQL 特性是如何執行的。此外，還包括了何時使用 PL/SQL 的程序能力的討論，以及一系列示例，展示在您可能遇到的常見查詢中應用不同 SQL 特性的混合。
您將學到的內容：
- 從 Oracle SQL 獲得競爭優勢
- 知道何時應該轉向 PL/SQL 而不是停留在 SQL
- 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慧查詢
- 利用 Oracle Database 特有的功能，例如行模式匹配
- 理解不同 SQL 方法解決常見查詢任務的優缺點
- 使用 CONNECT BY 和遞迴子查詢因式分解遍歷層級結構
本書適合對象：
具有一定 Oracle Database 經驗的資料庫程式設計師。本書也適合正在轉向 Oracle Database 平台或想要學習其查詢引擎獨特功能的 SQL 開發人員。這兩類讀者將學會將 Oracle 自有 SQL 方言的全部功能應用於常見的商業問題和查詢挑戰。
