寻找从出版商那里借书的名字
[英]finding names who've borrowed books from publisher
问题描述
I'm working on a homework assignment, and I'm just plain stuck on this one. 
我正在完成一项家庭作业，我只是坚持这个。
The structure I'm given is this: 我给出的结构是这样的：
member(memb_no, name, age)
book(isbn, title, authors, publisher)
borrowed(memb_no, isbn, date)
The question is basically to return the table of names that have borrowed ALL books of a given publisher (McGraw-Hill). 问题基本上是返回已借用给定出版商（McGraw-Hill）的所有书籍的名称表。
I just did the previous question, which was the same except ANY book from that publisher, but I just can't think of how I would check to see if I member has borrowed ALL the books from a given publisher, using just MySQL. 我只是做了上一个问题，除了那个出版商的任何一本书之外都是一样的，但是我想不出我会怎么检查我的成员是否只使用MySQL借用了给定出版商的所有书籍。
Could anyone suggest how to go about solving this? 任何人都可以建议如何解决这个问题？ Thank you! 谢谢！
1 个解决方案
解决方案1
2 2011-03-02 06:15:00
I won't give you an answer, but I will suggest some topics to check out. 我不会给你答案，但我会建议一些主题来检查。
Look into these SQL clauses: 查看这些SQL子句：
- JOIN 加入
- COUNT 计数
- GROUP BY 通过...分组
- HAVING HAVING
Also explore the concept of subqueries within the select clause. 还要探索select子句中子查询的概念。
Happy hunting! 快乐狩猎！
( A quick general SQL resource which describes a few of those terms) ( The relevant MySQL documentation page ) （ 快速通用SQL资源 ，描述了其中的一些术语）（ 相关的MySQL文档页面 ）
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