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ThinkPHP多表联合查询的常用方法

ThinkPHP中关联查询（即多表联合查询）可以使用 table() 方法或和join方法，具体使用如下例所示：

1、原生查询示例：

$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();