批改状态:合格
老师批语:

$arr = ['Cno' => 8,'Cname' => '数学','Cpno' => 7, 'Ccredit' => 10];Db::table('course')->insert($arr);
$arr = [['Cno' => 9,'Cname' => '数学','Cpno' => 7, 'Ccredit' => 10],['Cno' => 10,'Cname' => '数学','Cpno' => 2, 'Ccredit' => 10]];Db::table('course')->insertAll($arr);
$arr = ['Cno' => 11,'Cname' => '数学','Cpno' => 7, 'Ccredit' => 10];$res = Db::table('course')->insertGetId($arr);echo $res;
$res = Db::table('course')->where('Cno',8)->delete();
查询一条数据
$res = Db::table('course')->where('Cno','2')->field('Cno')->find();print_r($res);
查询多条数据
$res = Db::table('course')->where('Cno','2')->find();print_r($res);
$res = Db::table('course')->where('Cno',8)->update($arr);
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