Why does the QSqlQuery::value: not positioned on a valid record error occur?

Question

Qt

There is this code:

static unsigned CountUpload = 0;
// получаем данные из БД
Query.exec("SELECT * FROM Channels LIMIT 10 OFFSET " + static_cast<QString>(10 * CountUpload));
// увеличиваем счетчик сделанных запросов
CountUpload++;
Query.next();
qDebug() << Query.value(0).toString();

Its meaning is that when requested, the next 10 channels from the database are sent to the client. For the sake of testing, I print the 0th field of the first record to the console, but it gives me the error described in the title. Tell me, please, what's wrong? Thank you.

Answer 1

https://stackoverflow.com/questions/9000123/qsqlqu...