QSqlQuery query;
query.prepare(selectQuery() + QString("WHERE xid_conference = :conf AND start >= :start AND start < :end ORDER BY %1").arg(orderBy));
query.bindValue(":conf", conferenceId);
query.bindValue(":start", convertToDb(date, QVariant::DateTime));
query.bindValue(":end", convertToDb(date.addDays(1), QVariant::DateTime));
QSqlQuery query;
query.prepare(selectQuery() + QString("WHERE xid_conference = :conf AND start >= :start AND start < :end ORDER BY %1").arg(orderBy));
query.bindValue(":conf", conferenceId);
query.bindValue(":start", convertToDb(date, QVariant::DateTime));
query.bindValue(":end", convertToDb(date.addDays(1), QVariant::DateTime));