我有一个在数据库中运行的代码,并将所有内容输出到php页面。$avg = mysql_query("SELECT subject, gradeone, gradetwo, gradethree, ((gradeone + gradetwo + gradethree) / 3) as average FROM grades");
$q = mysql_query("SELECT * FROM newstudent AS n JOIN grades AS g ONn.id = g.id ORDER B