圖書標籤: SQL 數據庫 計算機 程序世界 Database DataBase
发表于2024-11-10
SQL and Relational Theory pdf epub mobi txt 電子書 下載 2024
SQL is full of difficulties and traps for the unwary. Understanding relational theory is essential for avoiding those traps, but you need to know how to map the ideas of that theory into SQL code. In SQL and Relational Theory, author C.J. Date demonstrates how you can apply relational theory directly to your use of SQL. The second edition includes updated material such as recursive queries, new operators, and extended discussion of topics including aggregate operators, grouping and ungrouping, and view updating. With numerous examples, exercises, and clear explanations, you'll learn how to deal with common SQL dilemmas, such as: * Why is proper column naming so important? * Nulls in your database are causing you to get wrong answers. Why? What can you do about it? * Could you write an SQL query to find employees who have never been in the same department for more than six months at a time? * SQL supports "quantified comparisons," but they're better avoided. Why? How do you avoid them? * Constraints are crucially important, but most SQL products don't support them properly. What can you do to resolve this situation? SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of the material available anywhere. Anyone with a modest to advanced background in SQL will benefit from the many insights in this book.
C. J. Date是關係數據庫技術領域中非常著名的獨立撰稿人、講師、學者和顧問。他撰寫瞭多部數據庫技術書籍,其中最齣名的著作是《數據庫係統導論》,這本書已經銷售瞭大約85萬冊,並被世界範圍內的幾百所大學作為教材使用。他因具有一流的將復雜技術進行清晰解讀的能力而享有盛譽。
隻讀瞭前麵幾章,實在是比較晦澀的書,書偏理論,而且作者的觀點比較主觀,咬文嚼字的比較多。個人覺得未必要接受作者的觀點,不過通過作者拋齣的觀點,可以進行思考。
評分C.J. Date 關於SQL和關係理論的一本中級讀物。
評分隻讀瞭前麵幾章,實在是比較晦澀的書,書偏理論,而且作者的觀點比較主觀,咬文嚼字的比較多。個人覺得未必要接受作者的觀點,不過通過作者拋齣的觀點,可以進行思考。
評分Written by a grumbling old brit.......way too verbose.
評分C.J. Date 關於SQL和關係理論的一本中級讀物。
【编辑推荐】 关系数据库领域的经典之作,关系数据领域泰斗级人物40年经验的结晶! 【内容简介】 对于数据库管理与开发人员来说,使用SQL时会到处遭遇困难和陷阱。只有深入理解关系理论,并将理论应用于实践,才能避免这些困难和陷阱。本书作者深入阐述了关系理论,以严谨的态...
評分首先看到这本书,原版是O‘ Reilly的,对于O’Reilly的书,我是无限敬仰的,基本上不用考虑品质的问题。 但是呢,这本书的封面却完全不是O‘Reilly的风格,我们都支持O’Reilly的书封面都是用动物做封面的,而这次却是一个书卡。 首先我怀疑这是假冒的,于是稍微翻了翻里面的...
評分 評分【编辑推荐】 关系数据库领域的经典之作,关系数据领域泰斗级人物40年经验的结晶! 【内容简介】 对于数据库管理与开发人员来说,使用SQL时会到处遭遇困难和陷阱。只有深入理解关系理论,并将理论应用于实践,才能避免这些困难和陷阱。本书作者深入阐述了关系理论,以严谨的态...
評分SQL and Relational Theory pdf epub mobi txt 電子書 下載 2024