static String buildSelectSql(String table, String[] fields) {
        var sj = "SELECT " + String.join(", ", fields) + " FROM " + table;
        return sj;
    }

    static String buildSelectSql2(String table, String[] fields) {
        var sj = new StringJoiner(", ", "SELECT ", " FROM " + table);
        for (String item : fields) {
            sj.add(item);
        }
        return sj.toString();
    }

    static String buildSelectSql3(String table, String[] fields) {
        var sb = new StringBuilder();
        sb.append(" FROM ").append(table);
        var sj = new StringJoiner(", ", "SELECT ", sb);
        for (String item : fields) {
            sj.add(item);
        }
        return sj.toString();
    }