Insert data

CREATE TABLE IF NOT EXISTS `siswa` (
`id_siswa` int(4) NOT NULL,
  `nama_siswa` varchar(50) NOT NULL,
  `usia_siswa` varchar(5) NOT NULL ,
  `kelas_siswa` varchar(4) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

ALTER TABLE `siswa`
 ADD PRIMARY KEY (`id_siswa`);

ALTER TABLE `siswa`
MODIFY `id_siswa` int(4) NOT NULL AUTO_INCREMENT;