$rules=M('','dc_')
->table('__A__ as a')
->join('__A__ b ON a.id = b.pid')
->where($map)
->getField('a.id,a.title,b.title',':');//不支持多表,a.title被b.title覆盖 $rules=M('','dc_')
->table('__A__ as a')
->join('__A__ b ON a.id = b.pid')
->where($map)
->getField('a.id,a.title,b.title',':');//不支持多表,a.title被b.title覆盖 