ThinkPHP多表查询处理
ThinkPHP多表连接查询处理
ThinkPHP关联查询(多表查询)
网上找到三种方法:table()、join()、原生SQL语句查询。(以下三种方法输出结果一致,并且很好的保留了ThinkPHP自己的分页功能)
第一种:table()方法
实例:需要连接查询两张表(表agent和表transinfo)
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$Model = new Model();
$sqlcount = "select count(*) as mycount from agent a ,transinfo t where t.clientId=a.id and t.transType like '%agent%' and a.id in (" . $agent_str . ")" ;
$listCount = $Model ->query( $sqlcount );
$Page = new Page ( $listCount [0][mycount], 2 );
$show = $Page ->show ();
$list = $Model ->table( 'agent a, transinfo t' )->where( "t.clientId=a.id and t.transType like '%agent%' and a.id in (" . $agent_str . ")" )->limit ( $Page ->firstRow . ',' . $Page ->listRows )->select();
//echo $Model->getLastSql(); $this ->assign( 'list' , $list ); // 赋值数据集
$this ->assign( 'page' , $show ); // 赋值分页输出
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第二种:join()方法
实例:需要连接查询两张表(表agent和表transinfo)
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$Model = new Model();
$agentModel = $Model ->Table( "agent" );
$listCount = $agentModel ->join( " AS a RIGHT JOIN transinfo t ON t.clientId=a.id and t.transType like '%agent%' and a.id in (" . $agent_str . ")" )
->field( "count(*) as mycount" )
->select();
$Page = new Page ( $listCount [0][mycount], 2 );
$show = $Page ->show ();
$Model = new Model();
$agentModel = $Model ->Table( "agent" );
$list = $agentModel ->join( " AS a RIGHT JOIN transinfo t ON t.clientId=a.id and t.transType like '%agent%' and a.id in (" . $agent_str . ") order by t.id DESC limit " . $Page ->firstRow. "," . $Page ->listRows)
->field( "a.*,t.*" )
->select();
//echo $agentModel->getLastSql(); $this ->assign( 'list' , $list ); // 赋值数据集
$this ->assign( 'page' , $show ); // 赋值分页输出
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提示:你也可以这样实例化更简洁(官方推荐的):$agentModel = M('Agent'); // 实例化User对象
第三种:原生SQL语句查询法
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$Model = new Model();
$sqlcount = "select count(*) as mycount from agent a ,transinfo t where t.clientId=a.id " . $where . " and t.transType like '%agent%' and a.id in (" . $agent_str . ")" ;
$listCount = $Model ->query( $sqlcount );
$Page = new Page( $listCount [0][ 'mycount' ],2); // 实例化分页类 传入总记录数和每页显示的记录数
$show = $Page ->show();
$sqlList = "select t.*,a.* from agent a ,transinfo t where t.clientId=a.id " . $where . " and t.transType like '%agent%' and a.id in (" . $agent_str . ") limit {$Page->firstRow},{$Page->listRows}" ;
$list = $Model ->query( $sqlList );
$this ->assign( 'list' , $list ); // 赋值数据集
$this ->assign( 'page' , $show ); // 赋值分页输出
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参考资料:
http://hi.baidu.com/wjlhh001/item/18d9a91031081b5e2a3e22af
http://www.yunda51.com/304.html
http://www.w3school.com.cn/sql/sql_join_right.asp
本文转自许琴 51CTO博客,原文链接:http://blog.51cto.com/xuqin/1564492,如需转载请自行联系原作者