ThinkPHP多表联合查询的常用方法
这篇文章主要介绍了ThinkPHP多表联合查询的常用方法,对于项目开发非常重要!需要的朋友可以参考下,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();
- $sql = 'select a.id,a.title,b.content from think_test1 as a, think_test2 as b where a..$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' );
Thinkphp使用join联表查询的方法
- $user = M('user');
- $b_user = M('b_user');
- $c_user = M('c_user');
- $list = $user->alias('user')->where('user.user_type=1')
- ->join('b_user as b on b.b_userid = user.user_id')
- ->join('c_user as c on c.c_userid = b.b_userid')
- ->order('b.user_time')
- ->select();
$user 表的 user_id 等于$b_user表的b_userid;
$c_user表的 c_userid 等于$b_user表的b_userid;
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();