1:ͼ  oa_bookclass

  id int
  classname
  companyid

2: ͼǼǱ oa_book

 id
 classid vid
 booknum  char 100
 bookname  char 100
 price
 anthor 
 bookout  nvarchar 200
 buytime 
 txt  ntext
 bookflag ״̬ (ڿ,)
 companyid
 

3: ͼĵǼǱ oa_bookout
  id int
  bookid int
  uname 
  out_time 
  back_time 黹
  back_time1 ʱ黹
  companyid
  txt

̶ʲϵͳ

ʲǼǱ oa_fourch
  id int
  f_num ʲ
  f_name ʲ
  f_type ͺ
  f_made 
  f_class ʲ
  f_outtime 
  f_buytime 
  f_zjtype ۾
  f_oldprice ʲԭֵ
  f_lessprice ʲֵ
  f_ztime ʼ۾
  f_bname 
  f_dname Ǽ
  f_dtime Ǽ
  f_txt ע
  companyid

2: ʲ oa_fourchclass

  id
  classname
 companyid

3: ۾ oa_zjclass
  id
  classname 
  zjl ۾
  zjq ۾(1۾  2۾)
 companyid
  