option, all records from other tables that have this key as their foreign key are also deleted. Use this option with great care; it is possible that a major portion of the database can be deleted.
选项删除主关键字字段，则其他以该关键字作为外部关键字的表格中的所有记录也将被删除。因此，请谨慎使用此选项，以避免删除数据库的主要部分。