1、数据类型是否为空/性质说明stu_idintnot null /PK标明学生唯一学号stu_namevarcharnot null学生姓名stu_sex学生性别stu_age学生年龄stu_pro学生专业stu_grade学生年级stu_integritynot null/default=1学生诚信级book:book_idnot null / PK唯一书籍序号book_name书籍名称book_author书籍作者book_pub书籍出版社book_numint not null 书籍是否在架上book_sort书籍分类book_recorddatatimenull书籍登记日期book_so
2、rt:sort_id类型编号sort_name类型名称borrow:存储学生的借书信息student_id学生编号varchar 书籍编号borrow_date借书时间expect_return_datedatetime预期归还时间return_table:存储学生的归还信息return_date实际还书时间ticket:存储学生的罚单信息over_date超期天数ticket_feefloat处罚金额manager:manager_id管理员编号manager_name管理员姓名manager_age管理员年龄manager_phone管理员电话3、设计索引给出在各表上建立的索引以及使用的语
3、句。1.为stu_id创建索引,升序排序sql:create index index_id on student(stu_id asc);2.为stu_name创建索引,并且降序排序alter table student add index index_name(stu_name, desc);插入索引操作和结果如下所示:mysql create index index_id on student(stu_id asc);Query OK, 0 rows affectedRecords: 0 Duplicates: 0 Warnings: 0 alter table student add i
4、ndex index_name(stu_name desc);1.为book_id创建索引,升序排列create index index_bid on book(book_id);2.为book_record创建索引,以便方便查询图书的登记日期信息,升序:create index index_brecord on book(book_record);插入索引的操作和结果如下所示: create index index_bid on book(book_id); create index index_brecord on book(book_record);1.为stu_id和book_id创建
5、多列索引:create index index_sid_bid on borrow(stu_id asc, book_id asc); create index index_sid_bid on borrow(stu_id asc, book_id asc);create index index_sid_bid on return_table(stu_id asc, book_id asc); create index index_sid_bid_r on return_table(stu_id asc, book_id asc);1. 为stu_id和book_id创建多列索引:create
6、 index index_sid_bid on ticket(stu_id asc, book_id asc); create index index_sid_bid on ticket(stu_id asc, book_id asc);1.为manager_id创建索引:create index index_mid on manager(manager_id); create index index_mid on manager(manager_id);4、设计视图给出在各表上建立的视图以及使用的语句。1.在表student上创建计算机专业(cs)学生的视图stu_cs: create vi
7、ew stu_cs asselect *from studentwhere pro = cs;操作和结果: create view stu_cs aswhere stu_pro = cs;2. 在表student, borrow和book上创建借书者的全面信息视图stu_borrow: create view stu_borrow asselect student.stu_id, book.book_id, student.stu_name, book.book_name, borrow_date,adddate(borrow_date,30) expect_return_datefrom s
8、tudent, book, borrowwhere student.stu_id = borrow.stu_id and book.book_id = borrow.book_id;3.创建类别1的所有图书的视图cs_book: create view cs_book asfrom bookwhere book.book_sort in(select boofrom book_sortwhere sort_id = 1);操作和结果显示: create view cs_book as(select book_sort.sort_name4.创建个人所有借书归还纪录视图stu_borrow_re
9、turn:create view stu_borrow_return asselect student.stu_id, student.stu_name, book.book_id, book.book_name,return_table.borrow_date,return_table.return_datefrom student, book, return_tablewhere student.stu_id = return_table.stu_id and book.book_id = return_table.book_id;5、设计触发器给出在各表上建立的触发器以及使用的语句。1.
10、设计触发器borrow, 当某学生借书成功后,图书表相应的图书不在架上,变为0:create trigger borrowafter insert on borrowfor each rowbeginupdate book set book_num = book_num 1where book_id = new.book_id;end操作与结果显示: delimiter $ create trigger trigger_borrow- after insert on borrow for each row begin update book set book_num = book_num -
11、1 where book_id = new.book_id; end $在插入表borrow之前,book_id = 1 的图书还在架上,为1:学生1借了这本书后,在borrow中插入了一条记录:在borrow中插入这条记录后,book_id =1的图书,不在架上,为0:2.设计触发器trigger_return, 还书成功后,对应的书籍book_num变为1:create trigger trigger_returnafter insert on return_tableupdate book set book_num = book_num + 1还书时在return_table插入表项:此
12、时图书归还架上:3.定义定时器(事件)eventJob,每天自动触发一次,扫描视图stu_borrow,若发现当前有预期归还时间小于当前时间,则判断为超期,生成处罚记录,这个定时器将每天定时触发存储过程proc_gen_ticket:create event if not exists eventJobon schedule every 1 DAY /*每天触发*/on completion PRESERVEdo call proc_gen_ticket(getdate(); /*调用存储过程*/set global event_scheduler = 1;alter event eventJ
13、ob on completion preserve enable; /*开启定时器*/1). 学生1借了图书1,生成借书记录stu_borrow视图,如下:2). 当他在1月27日前还书时,没有生成罚单:3). 当他在1月27日后还书时,生成罚单:4.设计触发器trigger_credit,若处罚记录超过30条,则将这个学生的诚信级设置为0,下次不允许借书:create trigger trigger_creditafter insert on ticketif (select count(*) from ticket where stu_id=new.stu_id)30 thenupdate
14、 student set stu_integrity = 0 where stu_id = new.stu_id;end if;操作和结果显示,测试时选择插入ticket项大于3,因为30太大了,不容易测试:学生1超过3次超期归还图书后,产生了4条罚单:此时触动触发器trigger_credit,将学生1的诚信级设置为0:四、应用程序设计与编码实现1、系统实现中存储函数和存储过程的设计要求给出功能描述和代码。1. 设计存储过程,产生罚单proc_gen_ticket:当日期超过预定归还日期时,产生罚单,并将记录写入表ticket中,这个存储过程在定时器eventJob中调用:sql:creat
15、e procedure proc_gen_ticket(in currentdate datetime)BEGINdeclare cur_date datetime;set cur_date = currentdate;replace into ticket(stu_id, book_id, over_date, ticket_fee)select stu_id, book_id, datediff(cur_date,stu_borrow.expect_return_date),0.1*datediff(cur_date,stu_borrow.expect_return_date)from s
16、tu_borrowwhere cur_datestu_borrow.expect_return_date;2.设计学生注册信息存储过程:学生注册信息stu_registercreate procedure stu_register(in stu_id int, in stu_name varchar(20), in stu_sex varchar(20), in stu_age int, in stu_pro varchar(20), in stu_grade varchar(20)insert into student(stu_id, stu_name, stu_sex, stu_age,
17、stu_pro, stu_grade)values(stu_id, stu_name, stu_sex, stu_age, stu_pro, stu_grade);3. 设计管理员注册信息存储过程:ma_registercreate procedure ma_register(in ma_id int, in ma_name varchar(20), in ma_age int, in ma_phone int)insert into managervalues(ma_id, ma_name, ma_age, ma_phone);END4. 借书过程的实现:1) 设计存储函数,func_get
18、_credit,返回学生的诚信级:create function func_get_credit(stu_id int) returns intreturn(select stu_integrity from student where student.stu_id = stu_id);2) 设计存储函数,func_get_booknum,返回书籍是否在架上:create function func_get_booknum(book_id int) returns intreturn(select book_num from book where book.book_id = book_id)
19、;3) 设计存储过程proc_borrow,调用func_get_credit和func_get_booknum,判断这个学生诚信度和书籍是否在架上,若为真,则借书成功,在borrrow表中插入纪录;否则提示失败:create procedure proc_borrow(in stu_id int, in book_id int, in borrow_date datetime)if func_get_credit(stu_id) = 1 and func_get_booknum(book_id) = 1 theninsert into borrowvalues(stu_id, book_id
20、, borrow_date);elseselect failed to borrow实验操作与结果显示:borrow纪录为空:执行函数,学生1借图书2:call proc_borrow(1,2,now();学生1的诚信级为0:借书失败:修改学生1诚信级为1:此时借书成功:5. 还书存储过程proc_return:当还书时,查看是否书是否超期,即查询ticket表项,当发现超期,提示交罚单后再次还书,如没有超期,则纪录归还项目到return_table中,并且删除借书纪录(以免还书后定时器仍然扫描这个纪录):create procedure proc_return(in stu_id int,
21、in book_id int, in return_date datetime)DECLARE borrowdate datetime;if (select payoff from ticket where ticket.stu_id = stu_id and ticket.book_id=book_id) = 1 then /*判断是否交了罚单,1表示没有交*/please pay off the ticketelse /*纪录归还项目到return_table中,并且删除借书纪录*/set borrowdate = (select borrow_date from borrow where borrow.stu_id = stu_id and borrow.book_id = book_id);insert into return_tablevalues(stu_id, book_id, borrowdate, return_date);delete from borrowwhere borrow.stu_id = stu_id and borrow.book_id = book_id;学生1借了图书2:超期产生