为什么输出错误，我不明白

Question

create table qbey (
idqbey int primary key auto_increment, 
bey int, 
users int, 
foreign key (users) references persons(idusers) on delete cascade on update cascade, 
foreign key (bey) references bey(idbey) on delete cascade on update cascade, 
); 

程序错误：

error code: 1005 can't create table '.\soft_tj\qbey.frm' (errno:150)

Answer 1

文档解释了这个错误，虽然它不是太容易找到：http://dev.mysql.com/doc/refman/5.1/en/innodb-foreign-key-constraints.html

If you re-create a table that was dropped, it must have a definition that conforms to the foreign key constraints referencing it. It must have the right column names and types, and it must have indexes on the referenced keys, as stated earlier. If these are not satisfied, MySQL returns error number 1005 and refers to error 150 in the error message.