Delete & Update query in .Net

 try
            {
                ConnectDB dbconToDeleteITStudent = new ConnectDB();
                OdbcConnection conToDelITStu = dbconToDeleteITStudent.createDBCon();



                OdbcCommand UpdateAttendanceComnew = new OdbcCommand(updateAttendances,                                  conToDelITStu);
                UpdateAttendanceComnew.ExecuteNonQuery();



                string deleteStudent = "DELETE FROM IT WHERE ITID = '" + SubID + "'";
                OdbcCommand command = new OdbcCommand(deleteStudent, conToDelITStu);
                command.ExecuteNonQuery();


            }