SQL and Relational Theory 在线电子书 图书标签: SQL 数据库 计算机 程序世界 Database DataBase
发表于2024-11-04
SQL and Relational Theory 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024
Written by a grumbling old brit.......way too verbose.
评分C.J. Date 关于SQL和关系理论的一本中级读物。
评分C.J. Date 关于SQL和关系理论的一本中级读物。
评分Written by a grumbling old brit.......way too verbose.
评分C.J. Date 关于SQL和关系理论的一本中级读物。
C. J. Date是关系数据库技术领域中非常著名的独立撰稿人、讲师、学者和顾问。他撰写了多部数据库技术书籍,其中最出名的著作是《数据库系统导论》,这本书已经销售了大约85万册,并被世界范围内的几百所大学作为教材使用。他因具有一流的将复杂技术进行清晰解读的能力而享有盛誉。
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.
【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...
评分【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...
评分 评分 评分【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...
SQL and Relational Theory 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024