3表查询，1：多：多，根据1查多再查多

1个代理人对应多个用户，用户对应多个订单

原生sql语句

$result = $users->query("select orderid,money,tid,username,game,type,ordertime 
            from (
                (cmf_agent a inner join cmf_q_users b on a.id=b.agent_id)
                inner join cmf_orders c on c.userid=b.id
            )where(
                agent_id = $agentid
            )"
        );

tp关联查询

$count1 = $users
        ->field('orderid,money,tid,username,game,type,ordertime')
        ->join('cmf_agent on cmf_q_users.agent_id = cmf_agent.id')
        ->join('cmf_orders on cmf_orders.userid = cmf_q_users.id')
        ->where($where)
        ->count();
        // dump($count1);

        $page = $this->page($count1, 10);

        $result = $users
        ->field('orderid,money,tid,username,game,type,ordertime')
        ->join('cmf_agent on cmf_q_users.agent_id = cmf_agent.id')
        ->join('cmf_orders on cmf_orders.userid = cmf_q_users.id')
        ->where($where)
        ->limit($page->firstRow . ',' . $page->listRows)
        ->select();