// выбираем переработки сотрудников из таблицы OverhoursDiversity
public List<OverhoursDiversity> getEmployeesOverhoursDiversity(string employee_id, string start_period, string begda, string endda, bool downloaded)
{
SQLDB sql = new SQLDB();
List<OverhoursDiversity> current = sql.getOverhoursDiversity(employee_id, start_period, begda, endda, downloaded);
return current;
}