TABLE :Book -表名称
BookISBN:char(30) pk
BookName:varchar(30) not null
AuthorName: varchar(50) not null
Publish:varchar(30) not null
Price : money not null
Keyword : varchar(30) not null
Qty : int not null
ProviderID : char(10) not null fk
Place : varchar(30)
TABLE : Provider
ProviderID:char(10) pk
ProviderName : varchar(30) not null
Phone : varchar(20)
Address : varchar(30)