Databases :: Fetching The Minimum Value From The Database?

MySqlCommand cmd4 = new MySqlCommand("select emp_name from employee_details where emp_category='" + cat[j] + "' and no_ofcassigned=(select MIN(no_ofcassigned) from employee_details)", AL.con);
MySqlDataReader reader2 = cmd4.ExecuteReader();
string emp=null;
while (reader2.Read())
{
emp = reader2[0].ToString();
}
reader2.Close();

i am using the above code to fetch the employee name from the datatable according to the minimum value in the column 'no_ofcassigned' in specific category but here if i have more than 3 employees with the same no_ofcassigned is there then the query is not