mysql触发器同步表的数据方式

delimiter $
create trigger '触发器名称' after/before insert/update/delete 
on '表名' for each row 
begin
	'触发的sql语句';
end $;
delimiter;

-- 插入触发器
delimiter $
create trigger trig_insert_book after insert 
on `library` for each row 
begin
	insert into book(`ref`,`name`,`price`,`press`)
    values (new.book_ref,new.book_name,new.book_price,new.book_press);
end $;
delimiter ;

insert into library(`library_id`,`book_ref`,`book_name`,`book_price`,`book_press`,`book_sum`,`library_name`,`library_adress`) 
values (11021,'ac1005','春秋',59.9,'小木出版社',60,'广州市图书馆','广州市')

-- 更新触发器
delimiter $
create trigger trig_update_book after update
on `library` for each row
begin
    update book set ref=new.book_ref,name=new.book_name,price=new.book_price,press=new.book_press;
end $
delimiter;

update library set book_name ='冬夏' where library_id=11021

delimiter $
create trigger trig_delete_book after delete 
on `library` for each row 
begin
	delete from book where  ref = old.book_ref;
end $;
delimiter;

delete from `library`  where book_ref = 'ac1005'