Thinkphp join connection query, thinkphpjoin_PHP tutorial

Thinkphp join connection query, thinkphpjoin

<span> 1</span> <span>public</span> <span>function</span><span> test ( )
</span><span> 2</span> <span>        {
</span><span> 3</span>             <span>$User</span> = M('authlist'<span>);
</span><span> 4</span>             <span>$rs</span> = <span>$User</span>-><span>join</span>('left join wifi_shop  on wifi_authlist.shopid = wifi_shop.id')->field('
<span> 5</span> <span>            wifi_authlist.id,
</span><span> 6</span> <span>            wifi_authlist.shopid,
</span><span> 7</span> <span>            wifi_authlist.routeid,
</span><span> 8</span> <span>            wifi_authlist.mac,
</span><span> 9</span> <span>            wifi_authlist.over_time,
</span><span>10</span> <span>            wifi_shop.id,
</span><span>11</span> <span>            wifi_shop.shopname,
</span><span>12</span> <span>            wifi_shop.pid,
</span><span>13</span> <span>            wifi_shop.trade,
</span><span>14</span> <span>            wifi_shop.province,
</span><span>15</span> <span>            wifi_shop.city,
</span><span>16</span> <span>            wifi_shop.area,
</span><span>17</span> <span>            count(wifi_authlist.mac) as times 
</span><span>18</span>             ')->where('wifi_shop.pid = %s',3)->group('wifi_authlist.mac')->order('over_time')->limit($Page->firstRow.','.$Page->listRows)->select()<span>;
</span><span>19</span>             dump(<span>$rs</span><span>);
</span><span>20</span>         }

What I am querying here is the wifi_shop and wifi_authlist tables, and the connection condition is

wifi_authlist.shopid = wifi_shop.id

Generally, it should be noted that the data table contains prefixes, so the prefix should be added when joining

Just three table connections plus one join

<span> 1</span> <span>$rs</span> = <span>$User</span>-><span>join</span>('left join wifi_shop  on wifi_authlist.shopid = wifi_shop.id')-><span>join</span>('left join wifi_phonelist on wifi_authlist.mac = wifi_phonelist.mac')->field('
<span> 2</span> <span>            wifi_authlist.id,
</span><span> 3</span> <span>            wifi_authlist.shopid,
</span><span> 4</span> <span>            wifi_authlist.routeid,
</span><span> 5</span> <span>            wifi_authlist.mac,
</span><span> 6</span> <span>            wifi_authlist.over_time,
</span><span> 7</span> <span>            wifi_authlist.agent,
</span><span> 8</span> <span>            wifi_shop.id,
</span><span> 9</span> <span>            wifi_shop.shopname,
</span><span>10</span> <span>            wifi_shop.pid,
</span><span>11</span> <span>            wifi_shop.trade,
</span><span>12</span> <span>            wifi_shop.province,
</span><span>13</span> <span>            wifi_shop.city,
</span><span>14</span> <span>            wifi_shop.area,
</span><span>15</span> <span>            wifi_phonelist.mac,
</span><span>16</span> <span>            wifi_phonelist.phone,
</span><span>17</span> <span>            count(wifi_authlist.mac) as times 
</span><span>18</span>             ')->where('wifi_shop.pid = %s',<span>$pid</span>)->group('wifi_authlist.mac')->order('over_time')->limit(<span>$Page</span>->firstRow.','.<span>$Page</span>->listRows)->select();

http://www.bkjia.com/PHPjc/1102858.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1102858.htmlTechArticleThinkphp join connection query, thinkphpjoin 1 public function test ( ) 2 { 3 $User = M('authlist' ) ; 4 $rs = $User - join ('left join wifi_shop on wifi_authlist.shopid = wifi_shop.id...