zoukankan      html  css  js  c++  java
  • Yii增删改查

     

    有人会问为什么不用 Yii 的 Model 去操作 DB,原因很简单,Yii 的 Model 写法上是方便了很多,但是会执行多余的 SQL,打开 Yii 的执行 log 就会发现。所以为了效率,为了 DB 服务器的性能考虑,还是使用 createCommand 的好。
    //insert
    $row = Yii::app()->getDb()->createCommand()->insert('goods', array(
                'good_name' => $goods_name,
                'good_type' => $goods_type,
                'price' => $price,
                'buy_nums' => 0,
                'commit_nums' => 0,
                'create_time' => time(),
            ));
    //select  单表查询
    $goodsTypes = Yii::app()->getDb()->createCommand()
                ->select('type_id, type_name')
                ->from('goods_type')
                ->where('status=1')->queryAll();
    //连表查询
    
    $goods = Yii::app()->getDb()->createCommand()->from('goods g')
            ->select('g.good_id, g.good_name, gt.type_name, g.price, g.buy_nums, g.commit_nums, g.create_time')
            ->join('goods_type gt', 'g.good_type=gt.type_id')
            ->where('g.`status`=1 and gt.`status`=1')
            ->order('g.create_time desc')
            ->queryAll();
    //delete
    
    $row = Yii::app()->getDb()->createCommand()
            ->delete('goods', "good_id=:good_id", array(
                ':good_id' => $goods_id,
            ));
    //update
    
    $row = Yii::app()->getDb()->createCommand()->update('goods', array(
        'good_name' => $goods_name,
        'good_type' => $goods_type,
        'price' => $price,
    ), "good_id='{$goods_id}'");
  • 相关阅读:
    C++调用web服务(java事例供参考)
    ASP.NET1.1与2.0如何引入MagicAjax (转载自http://hi.baidu.com/zzticzh)
    爱,在世界末日时
    Why Google Chrome is Multiprocess Architecture
    Chrome
    Code Reuse in Google Chrome
    Google V8 JavaScrit 研究(1)
    第一篇文章
    User Experience
    WPF
  • 原文地址:https://www.cnblogs.com/sunscheung/p/4895472.html
Copyright © 2011-2022 走看看