public class AlarmManage {			//알람 관리 
    	AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        Intent intent;
    public void setAlarm(){
    //Toast.makeText(getApplicationContext(), "알람이 설정되었습니다띠용", 
// Toast.LENGTH_LONG).show();
                        int hour = 0;
int minute = 0;
long alarmTime = 0;
int count = 0;
               DbAdapter dbAdapter; //db에서 시간정보 불러옴 ㅋ
    dbAdapter = new DbAdapter(getApplicationContext());
       dbAdapter.open();
    Cursor cursor;
cursor =
dbAdapter.mDb.rawQuery("SELECT hour,min,content FROM plan ORDER BY hour,min ASC;", null);
startManagingCursor(cursor);
PendingIntent[] sender = new PendingIntent[cursor.getCount()];  배열로만들어서 각각에다가 requestcode를 증 가시키면서 넣었습니다.
while(cursor.moveToNext()){
intent = new Intent(getApplicationContext(), AlarmReceiver.class);
sender[count] = PendingIntent.getBroadcast(getApplicationContext(), count, intent, 0);
배열로만들어서 각각에다가 requestcode를 가시키면서 넣었습니다.(count부분)
hour = cursor.getInt(0);
minute = cursor.getInt(1);
Calendar cal = new GregorianCalendar();
   cal.setTimeInMillis(System.currentTimeMillis());
   cal.set(Calendar.HOUR_OF_DAY, hour);
   cal.set(Calendar.MINUTE, minute);
   cal.set(Calendar.SECOND, 0);
   cal.set(Calendar.MILLISECOND, 0);

alarmTime = cal.getTimeInMillis();

am.set(AlarmManager.RTC_WAKEUP, alarmTime, sender[count]);

count = count++;

}
    }

결과는 등록된 여러개의 알람중 마지막것만 작동됩니다. 문제점좀 지적해주세요~!