这样的 SQL 查询语句对于你们而言是常态吗？

$query = Student::from('student as s')
            ->join('user as u','u.object_id','=','s.id')
            //2020 年 2 月 28 日 08:12:41 新增添加下载证书次数
            ->leftjoin('check_result as cr','s.id','cr.student_id')
            //->leftJoin('classroom_member as cm','cm.user_id','=','u.id')
            //->leftJoin('classroom as c',function($join){
            ->join('classroom_member as cm','cm.user_id','=','u.id')
            ->join('classroom as c',function($join){
                $join->on('c.id','=','cm.classroom_id')
                    ->where('c.status','<>',2);
            })
            ->when($year, function($query)use($year){
                return $query->whereRaw('SUBSTRING(c.start_date,1,4) = '.$year);
            })
            ->where('s.is_delete', 0)
            ->where('u.status',0)
            ->when(get_user_school_id(),function($query)
            {
                $query->where('c.school_id',get_user_school_id());
            })
            ->where('u.type',0) //学生
            ->when($search, function($query)use($search){
                return $query->where(function($q)use($search){
                    $q->where('s.name','like',$search.'%')
                    ->orWhere('s.mobile','like',$search.'%');
                });
            })
            ->orderBy('c.id','desc');

        $peixunrenci = $query->distinct('cm.id')->count('cm.id');

        $list = $query->groupBy('s.id')
            ->select(
                's.id as stuid','s.name','s.sex','s.nation','s.mobile','s.id_card','s.work',
                's.title','s.address', 's.email','s.office_phone','s.create_time','s.nation',
                's.post_code',  'u.id as uid','cr.download_count'
            )
            ->addSelect(DB::raw('count(distinct(cm.id)) as count, max(c.start_date) as date'))
            ->paginate($pageSize);