sql server 两个表之间的关联（触发器）

create trigger tri_user_book

on user_book

after update

as

begin

update book_borrow set book_borrow=user_book.borrow_is

from book_borrow

inner join inserted user_book on book_borrow.book_borrow=user_book.borrow_is

end

///

create trigger book_book_borrow

on books

for insert

as
declare  @book_name  varchar(20)
  declare  @book_num  varchar(20)
   --declare  @book_borrow_is  int
   -- select @a=id from inserted  
   select @book_name=book_name,@book_num=book_num from inserted
   insert into book_borrow(book_borrow_num,book_borrow_name)values(@book_num,@book_name)