MySQL “ERROR 1005 (HY000): Can't create table 'foo.#sql-12c_4' (errno: 150)”?

I was working on creating some tables in database foo, but every time I end up with errno 150 regarding the foreign ...

Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths - why??

I've been wrestling with this for a while and can't quite figure out what's happening. I have a Card entity which c...

Foreign key referring to primary keys across multiple tables??

I have to two tables namely employees_ce and employees_sn under the database employees. They both have their respe...