数据库系统概念第六版ppt，数据库系统概念第六版官方配套ppt，给有需要的同学！

数据库系统概念 英文精编版 第6版 [美]Abraham 课后答案的描述 我从学院的网站上下载的，据说是代课老师做的答案，貌似版本有点低，但是大部分答案都有，要仔细找一下，顺序是乱的。 上学期买的答案书，用扫描仪一页一页扫的。不知道算不算侵权，需要的朋友下了自个看吧，别再传其他网站了。 此课后习题答案对应的教材信息如下： 书名：数据库系统概念 英文精编版 第6版 作者：[美]Abraham Silberschatz 杨冬青

大家好，这是数据库系统概念第六版课后习题答案(包括实践习题和习题答案两部分，在压缩文件里面已经分别注释了)，唯一不足之处答案是英文版的，如果有谁有中文版的请共享出来，好东西大家一起共享，不要积分，放心下载。

数据库系统概念第六版习题答案(完整英文版)。看书过程会进行翻译，笔记。

数据库系统概念（中文完整第六版）文字可复制版

数据库系统概念第六版课后习题和实践题答案数据库系统概念第六版课后习题和实践题答案

数据库系统概念第六版书后习题全部答案（英文）Database_System_Concepts_6th_edition-solutions to practice exercises and exercises (answers)

数据库系统概念第六版答案（包括实践习题，习题）例如3.11答案Exercises •Write the following queries in SQL, using the university schema. •Find the names of all students who have taken at least one Comp. Sci. course; make sure there are no duplicate names in the result. •Find the IDs and names of all students who have not taken any course offering before Spring 2009. 11 •For each department, find the maximum salary of instructors in that department. You may assume that every department has at least one instructor. •Find the lowest, across all departments, of the per-department max- imum salary computed by the preceding query. Answer: •SQL query: select name from student natural join takes natural join course where course.dept = ’Comp. Sci.’ •SQL query: select id, name from student except select id, name from student natural join takes where year < 2009 Since the except operator eliminates duplicates, there is no need to use a select distinct clause, although doing so would not affect correctness of the query. •SQL query: select dept, max(salary) from instructor group by dept