Laravel框架执行原生SQL语句及使用paginate分页的方

public function getList($data){
//获取前端传过来的参数
  $user = $data['userId'];
  $office = $data['officeId'];
  $key = $data['oneKeySearch'];
//进行模糊搜索和联合查询
  $where = 'and 1=1 ';
  if($key!=null) {
    $where.= ' and ( a.code like "%' . $key . '%"';
    $where.= ' or b.name like "%' . $key . '%"';
    $where.= ' or c.name like "%' . $key . '%")';
  }
//对前端传回的字段进行判断，如果不为空则执行条件查询
  if($user!=null){
    $user='and a.userId='.$user;
  }
  if($office!=null){
    $office='and a.officeId='.$office;
  }
//自定义原生sql语句，%s可以传参数到sql语句中，格式如下
  $sqlTmp=sprintf('select a.id,a.code,a.attendanceRate,a.statisticTime,
            b.`realName` as userName,c.`name` as officeName
            from xxxa1
            LEFT JOIN xxx2 b ON a.userId=b.id
            LEFT JOIN xxx3 c ON a.officeId=c.id
    where a.deleted_at is null and 1=1 %s %s %s ORDER BY a.code
    ', $where,$office,$user);
//执行SQL语句
  $results = DB::select($sqlTmp);
//返回结果
  return $results;
}

public function getList($data){
//获取前端传过来的参数
  $user = $data['userId'];
  $office = $data['officeId'];
  $key = $data['oneKeySearch'];
/
  1、表格使用别名直接是 “表名 as table1" ,(狼蚁网站SEO优化是xxx1 as a）
  2、左连接DB::table('表1')
         ->leftJoin('表2', '表1.id', '=', '表2.外键关联')
  3、因为使用了软删除，所以在查询的时候要加上 ->whereNull('a.deleted_at')
  4、使用 DB::raw方法创建一个原生表达式，写进要查询的字段名称
     ->select(DB::raw('a.id,a.code,b.`realName` as userName,c.`name` as officeName'))
 5、使用orderBy进行排序
 
 /
     $data=DB::table('_attendance_sta as a')
       ->leftJoin('sys_user as b', 'b.id', '=', 'a.userId')
       ->leftJoin('sys_office as c', 'c.id', '=', 'a.officeId')
      ->select(DB::raw('a.id,a.code,a.attendanceRate,a.statisticTime,
              b.`realName` as userName,c.`name` as officeName'))
       ->whereNull('a.deleted_at')
       ->orderBy('a.code', 'desc');
 //使用 if(!empty(xxx)){}，来判断前端传过来的参数是否为空，不为空则执行条件查询
     if(!empty($user)){
       $data = $data->where( 'a.userId',$user);
     }
    if(!empty($office)){
      $data = $data->where( 'a.officeId',$office);
    }
 //使用 if(!empty(xxx)){}，来判断前端传过来的参数是否为空，不为空则执行模糊搜索和联合查询
    if (!empty($key)) {
      $data = $data->where(function ($query) use ($key) {
        $query->where('a.code', 'like', "%{$key}%")
          ->orWhere('b.name', 'like', "%{$key}%")
          ->orWhere('c.name', 'like', "%{$key}%");
      });
    }
//使用->paginate(10)进行分页
    $results=$data ->paginate(10);
    return $results;
}