hi this is the code i'm using: private Connection getMonetDBConnection(){ Connection c=null; try { Class.forName("nl.cwi.monetdb.jdbc.MonetDriver"); } catch (ClassNotFoundException e) { System.out.println("Impossibile caricare i driver MonetDB"); e.printStackTrace(); } try { c=DriverManager.getConnection("jdbc:monetdb://localhost/demo", "monetdb", "monetdb"); c.setAutoCommit(true); System.out.println("Restituita connessione: "+c); } catch (SQLException e) { System.out.println("Impossibile stabilire una connessione con MonetDB"); e.printStackTrace(); } return c; } I must insert in my table result of a select on other db: ..... String insert="INSERT INTO MYTABLE VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,? ,?,?)"; ps=connMonetDB.prepareStatement(insert); while (rs.next() ){ ps.setString(1,rs.getString(1)); ps.setInt(2,rs.getInt(2)); ps.setInt(3,rs.getInt(3)); ps.setString(4,rs.getString(4)); ps.setString(5,rs.getString(5)); ps.setString(6,rs.getString(6)); ps.setInt(7,rs.getInt(7)); ps.setString(8,rs.getString(8)); ps.setString(9,rs.getString(9)); ps.setString(10,rs.getString(10)); ps.setString(11,rs.getString(11)); ps.setString(12,rs.getString(12)); ps.setString(13,rs.getString(13)); ps.setString(14,rs.getString(14)); ps.setString(15,rs.getString(15)); ps.setString(16,rs.getString(16)); ps.setLong(17,rs.getLong(17)); ps.setLong(18,rs.getLong(18)); ps.setLong(19,rs.getLong(19)); ps.setLong(20,rs.getLong(20)); ps.setLong(21,rs.getLong(21)); ps.setLong(22,rs.getLong(22)); ps.setLong(23,rs.getLong(23)); ps.setLong(24,rs.getLong(24)); ps.setLong(25,rs.getLong(25)); ps.setLong(26,rs.getLong(26)); ps.setLong(27,rs.getLong(27)); ps.setLong(28,rs.getLong(28)); ps.setLong(29,rs.getLong(29)); ps.setLong(30,rs.getLong(30)); ps.setLong(31,rs.getLong(31)); ps.setLong(32,rs.getLong(32)); ps.setLong(33,rs.getLong(33)); ps.setLong(34,rs.getLong(34)); ps.setLong(35,rs.getLong(35)); ps.setLong(36,rs.getLong(36)); ps.setLong(37,rs.getLong(37)); ps.setLong(38,rs.getLong(38)); ps.execute(); System.out.println("Elaborata posizione nr "+i); i++; } ps.close(); connMonetDB.close(); Where is the wrong? tnx Raffaele