このエラーはどこにありませんか

Question

SELECT e.emp_id, concat(e.firstname,' ', e.middlename,' ',e.lastname) as EmployeeName , 
(select * from mst_attendance where status='Present' AND a.current_date > '#2008-09-29%#' GROUP BY substr('emp_id',0,5) HAVING COUNT(*)>1 ORDER BY a.emp_id='5') as PresentDays, 
a.emp_id, a.current_date, a.status, a.in_time, a.out_time FROM mst_attendance a 
INNER JOIN mst_employee e ON a.emp_id=e.emp_id where e.status='active' 
and e.flag='Y' and e.role='employee' and e.emp_id='5' ORDER BY a.created asc LIMIT 1 

ここで私は従業員の現在の日を知りたいと思います。しかし、私はエラーを取得する：

1241 - Operand should contain 1 column(s)..

Answer 1

代わりの

(select * from mst_attendance where status='Present' AND a.current_date > '#2008-09-29%#' GROUP BY substr('emp_id',0,5) HAVING COUNT(*)>1 ORDER BY a.emp_id='5') as PresentDays 

クエリが

(select column_name from mst_attendance where status='Present' AND a.current_date > '#2008-09-29%#' GROUP BY substr('emp_id',0,5) HAVING COUNT(*)>1 ORDER BY a.emp_id='5') as PresentDays