#include <QDebug>
#include <QtSql>

int main()
{

    QSqlDatabase sqlDatabase = QSqlDatabase::addDatabase("QSQLITE");
    sqlDatabase.setDatabaseName("/some/nonexistent/file.db");   //  use a non-existent file
    qDebug() << "DB opened:" << sqlDatabase.open();     //  DB opened: true

    QSqlQuery query = QSqlQuery(sqlDatabase);
    query.exec("SELECT * FROM settings");

    qDebug() << query.lastError();      //  QSqlError("1", "Unable to execute statement", "no such table: settings")


    return 0;
}