public static int sumDau_Rot()
        {
            int       i         = 0;
            string    Query     = " select ho_ten, THI_SINH.so_bao_danh,sum(diem_thi) sum_diem_thi , ma_nganh from KET_QUA_CHAM_THI, THI_SINH , PHIEU_DKDT where THI_SINH.so_bao_danh = KET_QUA_CHAM_THI.so_bao_danh and PHIEU_DKDT.ho_va_ten = THI_SINH.ho_ten group by ho_ten,THI_SINH.so_bao_danh , ma_nganh";
            string    nameTable = "KET_QUA_CHAM_THI, THI_SINH , PHIEU_DKDT";
            DataTable dt        = sqlDataTable.getDataTable(Query, nameTable);

            foreach (DataRow row in dt.Rows)
            {
                if ((double)row["sum_diem_thi"] >= DiemChuan.getDiemChuan((string)row["ma_nganh"]))
                {
                    i++;
                }
            }
            return(i);
        }
        public static bool Dau_Rot(string so_bao_danh)
        {
            string    Query     = " select ho_ten, THI_SINH.so_bao_danh,sum(diem_thi) sum_diem_thi , ma_nganh from KET_QUA_CHAM_THI, THI_SINH , PHIEU_DKDT where THI_SINH.so_bao_danh = KET_QUA_CHAM_THI.so_bao_danh and PHIEU_DKDT.ho_va_ten = THI_SINH.ho_ten group by ho_ten,THI_SINH.so_bao_danh , ma_nganh";
            string    nameTable = "DIEM_CHUAN";
            DataTable dt        = sqlDataTable.getDataTable(Query, nameTable);

            foreach (DataRow row in dt.Rows)
            {
                if ((string)row["so_bao_danh"] == so_bao_danh)
                {
                    if ((double)row["sum_diem_thi"] >= DiemChuan.getDiemChuan((string)row["ma_nganh"]))
                    {
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }
            return(false);
        }