Thinkphp join 连接查询

 public function test ( )
         {
             $User = M('authlist');
             $rs = $User->join('left join wifi_shop  on wifi_authlist.shopid = wifi_shop.id')->field('
             wifi_authlist.id,
             wifi_authlist.shopid,
             wifi_authlist.routeid,
             wifi_authlist.mac,
             wifi_authlist.over_time,
             wifi_shop.id,
             wifi_shop.shopname,
             wifi_shop.pid,
             wifi_shop.trade,
             wifi_shop.province,
             wifi_shop.city,
             wifi_shop.area,
             count(wifi_authlist.mac) as times
             ')->where('wifi_shop.pid = %s',3)->group('wifi_authlist.mac')->order('over_time')->limit($Page->firstRow.','.$Page->listRows)->select();
             dump($rs);
         }

我这里查询的是 wifi_shop 跟 wifi_authlist 表,连接条件是

wifi_authlist.shopid = wifi_shop.id

一般要注意的是数据表包含前缀, 所以再join里 要加上前缀

三个表连接再加一个join就行

 $rs = $User->join('left join wifi_shop  on wifi_authlist.shopid = wifi_shop.id')->join('left join wifi_phonelist on wifi_authlist.mac = wifi_phonelist.mac')->field('
             wifi_authlist.id,
             wifi_authlist.shopid,
             wifi_authlist.routeid,
             wifi_authlist.mac,
             wifi_authlist.over_time,
             wifi_authlist.agent,
             wifi_shop.id,
             wifi_shop.shopname,
             wifi_shop.pid,
             wifi_shop.trade,
             wifi_shop.province,
             wifi_shop.city,
             wifi_shop.area,
             wifi_phonelist.mac,
             wifi_phonelist.phone,
             count(wifi_authlist.mac) as times
             ')->where('wifi_shop.pid = %s',$pid)->group('wifi_authlist.mac')->order('over_time')->limit($Page->firstRow.','.$Page->listRows)->select();