absensi siasilah tidak dapat ditampilkan

Assalam, buka file 'messages.php' yang ada pada directory utama, lalu perbaiki query : 
 
# $tglabs = date("Y-n-d");
# $query = mysql_query("SELECT a.kodekelas, b.kelas, sum(a.hadir) as hadir, 
# sum(a.alpa) as alpa, sum(a.sakit) as sakit, sum(a.izin) as izin, a.tanggal 
# FROM `rb_absensi_siswa` a JOIN rb_kelas b ON a.kodekelas=b.kodekelas where a.tanggal='2015-12-09' GROUP BY a.kodekelas");
 
Hingga Menjadi seperti berikut : 
 
# $tglabs = date("Y-n-d");
# $query = mysql_query("SELECT a.kodekelas, b.kelas, sum(a.hadir) as hadir, 
# sum(a.alpa) as alpa, sum(a.sakit) as sakit, sum(a.izin) as izin, a.tanggal 
# FROM `rb_absensi_siswa` a JOIN rb_kelas b ON a.kodekelas=b.kodekelas where a.tanggal='$tglabs' GROUP BY a.kodekelas");

absensi guru juga tidak bisa tersimpan ya bang?