Hi, I have a java.util.List of values (10000) which i wanted to use for a query in the where clause of an simple select statement. iterating over the list and and use an prepared Statement is quite slow. Is there a more efficient way to execute such a query. Thanks for any help. Johannes ..... List ids = new ArrayList(); .... List is filled with 10000 values ... List uuids = new ArrayList(); PreparedStatement pstat = db.prepareStatement("SELECT UUID FROM MDM.KEYWORDS_INFO WHERE KEYWORDS_ID = ?"); for (Iterator iter = ids.iterator(); iter.hasNext();) { String id = (String) iter.next(); pstat.setString(1, id); rs = pstat.executeQuery(); if (rs.next()) { uuids.add(rs.getString(1)); } rs.close(); } ...