ThinkPHP中關聯查詢（即多表聯合查詢）可以使用 table() 方法或和join方法，具體用例如下：
1、原生查詢示例：
~~~
$Model = new Model();
$sql = 'select a.id,a.title,b.content from think_test1 as a, think_test2 as b where a.id=b.id '.$map.' order by a.id '.$sort.' limit '.$p->firstRow.','.$p->listRows;
$voList = $Model->query($sql);
~~~
2、join()方法示例：
~~~
$user = new Model('user');
$list = $user->join('RIGHT JOIN user_profile ON user_stats.id = user_profile.typeid' );
~~~
3、table()方法示例：
`$list = $user->table('user_status stats, user_profile profile')->where('stats.id = profile.typeid')->field('stats.id as id, stats.display as display, profile.title as title,profile.content as content')->order('stats.id desc' )->select();`
4、三表聯合查詢
~~~
$Model = M('T1');
$Model->join('t2 on t1.id = t2.uid', 'left')->join('t3 on t2.uid = t3.sid', 'left')->select();
~~~
