Как извлечь все значения из QTableWidget?

QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "memdb");
db.setDatabaseName(":memory:");

if (!db.open())
{
    qDebug() << db.lastError().text();
    // std::exit(1);
}

QSqlQuery q("", db);
q.exec("create table Universities (id integer primary key, Location varchar, Population integer)");
q.exec("insert into Universities values (0, 'MSK', 12000000)");
q.exec("insert into Universities values (1, 'NSK', 1600000)");
q.exec("insert into Universities values (2, 'SPB', 6000000)");
q.exec("insert into Universities values (3, 'PRM', 1000000)");

int sz = ui->tableWidget->rowCount();

QString queryString = "SELECT * FROM Universities WHERE Location IN (";
for(int i = 0; i < sz; ++i)
{
    queryString += "?,";
}
queryString.back() = ')';

QSqlQuery query(queryString, db);

for(int i = 0; i < sz; ++i)
{
  query.bindValue(i, ui->tableWidget->item(i, 0)->text());
}

if (!query.exec())
{
  qDebug() << query.lastError().text();
  // std::exit(1);
}

while(query.next())
{
  qDebug() << query.value(0).toInt() << " "
           << query.value(1).toString() << " "
           << query.value(2).toInt() << "\n";
}

QSqlQuery query;
query.prepare("SELECT * FROM Universities WHERE Location IN (?)");

int sz = ui->tableWidget->rowCount();

QVariantList values;
for(int i = 0; i < sz; ++i)
{
  values << ui->tableWidget->item(i, 0)->text();
}
    
query.addBindValue(values);
if (!query.execBatch())
{
  qDebug() << query.lastError();
}