two databases opened at the same time

[whoops.slo]

Hi!

Me again with my database based problems.
I have opened two databases in order to transfer data from one database to another. I declare first query as:

QSqlQuery query_read("SELECT * FROM groups", db1);
int is_kat = query_read.record().indexOf("group");
while(query_read.next()) {
	QString s_kat = query_read.value(is_kat).toString();
	//some code + declaration for another query
}

QSqlQuery query_read("SELECT * FROM groups", db1);
int is_kat = query_read.record().indexOf("group");
while(query_read.next()) {
	QString s_kat = query_read.value(is_kat).toString();
	//some code + declaration for another query
}

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The second query is declared inside the marked area like this:

QSqlQuery query_write(db2);
query_write.prepare("INSERT INTO kat (kategories) VALUES (:kategorie)");
query_write.bindValue(":kategorija", s_kat);
query_write.exec();

QSqlQuery query_write(db2);
query_write.prepare("INSERT INTO kat (kategories) VALUES (:kategorie)");
query_write.bindValue(":kategorija", s_kat);
query_write.exec();

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Compiling does not return any error, but the data is not transfered. Where is the error?

Regards,
Luka