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:
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$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( $sql ); |
2、join()方法示例:
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$user = new Model( 'user' ); $list = $user ->join( 'RIGHT JOIN user_profile ON user_stats.id = user_profile.typeid' ); |
Thinkphp使用join联表查询的方法
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$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:
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$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(); |
希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。