SQL数据库图书管理系统(完整代码)

说明：  ? 实现图书信息、类别、出版社等信息的管理； ? 实现读者信息、借阅证信息的管理； ? 实现图书的借阅、续借、归还管理； ? 实现超期罚款管理、收款管理； ? 创建触发器，分别实现借书和还书时自动更新图书信息的在册数量；(Realize the management of books information, categories, publishing houses and other information; Realize the management of reader information and borrowing card information. To realize the management of book borrowing, renewal and return; Achieve the management of overdue fines and receipts; Create triggers to automatically update the number of books in the book when borrowing and returning books, respectively.)