static String buildInsertSql(String table, String[] fields) {

var res = new StringBuilder();
res.append("INSERT INTO ")

.append(table)

.append(" (")

.append(String.join(", ", fields))

.append(") VALUES (")

.append(String.join(", ", Collections.nCopies(fields.length, "?")))

.append(")");

return res.toString();

}