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'
,
$show
);
// 赋值分页输出
|
第二种：join()方法
实例：需要连接查询两张表（表agent和表transinfo）
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$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'
,
$show
);
// 赋值分页输出
|
提示：你也可以这样实例化更简洁（官方推荐的）：$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
|
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
