本题用到下面三个关系表：
CARD 借书卡: (CNO 卡号，NAME 姓名，CLASS 班级)
BOOKS 图书: (BNO 书号，BNAME 书名,AUTHOR 作者，PRICE 单价，QUANTITY 库存册数 )
BORROW 借书记录: (CNO 借书卡号，BNO 书号，RDATE 还书日期
备注：限定每人每种书只能借一本；库存册数随借书、还书而改变。
要求实现如下处理：
- 写出自定义函数，要求输入借书卡号能得到该卡号所借书金额的总和
CREATE FUNCTION getSUM
(
@CNO int
)
RETURNS int
AS
BEGIN
declare @sum int
select @sum=sum(price) from BOOKS where bno in (select bno from BORROW where cno=@CNO)
return @sum
END
GO
2． 找出借书超过5本的读者,输出借书卡号及所借图书册数。
select CNO,count(BNO) as 借书数量from BORROW group by CNO having count(BNO)>3
3． 查询借阅了"水浒"一书的读者，输出姓名及班级。
select name,class from card where cno in( select cno from borrow where bno in(
select bno from BOOKS where bname='水浒'))
4． 查询过期未还图书，输出借阅者（卡号）、书号及还书日期。
select CNO,BNO,RDATE from borrow where getdate()>RDATE
5． 查询书名包括"网络"关键词的图书，输出书号、书名、作者。
select bno,bname,author from books where bname like '网络%'
6． 查询现有图书中价格最高的图书，输出书名及作者。
select bname,author from books where price in(select max(price) from books )
7． 查询当前借了"计算方法"但没有借"计算方法习题集"的读者，输出其借书卡号，并按卡号降序排序输出。
select cno from borrow where bno in (select bno from books where bname='计算方法') and cno not in ( select cno from borrow where bno in(select bno from books where bname='计算方法习题集')) order by cno desc
或
SELECT a.CNO
FROM BORROW a,BOOKS b
WHERE a.BNO=b.BNO AND b.BNAME=N'计算方法'
AND NOT EXISTS(
SELECT * FROM BORROW aa,BOOKS bb
WHERE aa.BNO=bb.BNO
AND bb.BNAME=N'计算方法习题集'
AND aa.CNO=a.CNO)
ORDER BY a.CNO DESC
8． 将"C01"班同学所借图书的还期都延长一周。
update borrow set rdate=dateadd(day,7,rdate) from BORROW where cno in(select cno from card where class='一班')
9． 从BOOKS表中删除当前无人借阅的图书记录。
DELETE A FROM BOOKS a
WHERE NOT EXISTS(
SELECT * FROM BORROW
WHERE BNO=a.BNO)
10．如果经常按书名查询图书信息，请建立合适的索引。
(这个不确定对不 90%应该是对的 自己看了下书写的)
CREATE CLUSTERED INDEX IDX_BOOKS_BNAME ON BOOKS(BNAME)
11．在BORROW表上建立一个触发器，完成如下功能：如果读者借阅的书名是"数据库技术及应用"，就将该读者的借阅记录保存在BORROW_SAVE表中（注ORROW_SAVE表结构同BORROW表）。
CREATE TRIGGER TR_SAVE ON BORROW
FOR INSERT,UPDATE
AS
IF @@ROWCOUNT>0
INSERT BORROW_SAVE SELECT i.*
FROM INSERTED i,BOOKS b
WHERE i.BNO=b.BNO
AND b.BNAME=N'数据库技术及应用'
12．建立一个视图，显示"力01"班学生的借书信息（只要求显示姓名和书名）。
CREATE VIEW V_VIEW
AS
select name,bname
from books,card,borrow
where borrow.cno=card.cno and borrow.bno=books.bno and class='一班'
13．查询当前同时借有"计算方法"和"组合数学"两本书的读者，输出其借书卡号，并按卡号升序排序输出。
select a.cno from borrow a,borrow b
where a.cno=b.cno and
a.bno in(select bno from books where bname='计算方法') and
b.bno in(select bno from books where bname='组合数学')
order by a.cno desc
或
SELECT a.CNO
FROM BORROW a,BOOKS b
WHERE a.BNO=b.BNO
AND b.BNAME IN('计算方法','组合数学')
GROUP BY a.CNO
HAVING COUNT(*)=2
ORDER BY a.CNO DESC
14、用事务实现如下功能：一个借书卡号借走某书号的书，则该书的库存量减少1，当某书的库存量不够1本的时候，该卡号不能借该书
alter PROCEDURE pro_jieshu
@cno int,
@bno int,
@date datetime
AS
BEGIN
begin tran
declare @quantity int
select @quantity=quantity from books where bno=@bno
insert into borrow values(@cno,@bno,@date)
update books set quantity=@quantity-1 where bno=@bno
if(@quantity>0)
begin
commit tran
end
else
begin
print '已无库存'
rollback
end
END
GO
15、用游标实现将书号为‘A001’的书本的价格提高10元
declare @bno int
declare @bname nvarchar(50)
declare @author nvarchar(50)
declare @price int
declare @quantity int
declare mycursor cursor for select * from books
open mycursor
fetch next from mycursor into @bno,@bname,@author,@price,@quantity
while(@@fetch_status=0)
begin
if(@bno=2)
begin
update books set price=@price+10 where current of mycursor
end
fetch next from mycursor into @bno,@bname,@author,@price,@quantity
end
close mycursor
deallocate mycursor