How can I add ON DUPLICATE KEY UPDATE to my query? about querybuilder HOT 3 CLOSED

                    var query = new Query(quelle.Tabelle).AsInsert(datensaetze);
                    var compiler = new MySqlCompiler();
                    var qStr = compiler.Compile(query).Sql + " ON DUPLICATE KEY UPDATE " + string.Join(",", datensaetze.Select(d => $"{d.Key} = {(d.Value is string ? $"'{MySqlHelper.EscapeString(d.Value)}'" : d.Value)}"));