public function getMinLimit () {
$sql = "..."; $result = yii::app()->db->createCommand($sql); $query = $result->queryAll(); return array ( $query [0] ['max'], ); }
$connection=Yii::app()->db;$sql="SELECT u.account,i.* FROM sys_user as u left join user_info as i on u.id=i.user_id";$rows=$connection->createCommand ($sql)->query();foreach ($rows as $k => $v ){ echo $v['add_time'];}
======================================== 事务
$db = Yii::app()->db;
$dbTrans = $db->beginTransaction(); $dbTrans->commit();$dbTrans->rollback();
======================================== 分页
一般写法：$criteria = new CDbCriteria;$count = DnOnline::model()->count($criteria);$pages = new CPagination($count); $pages->pageSize = 5;$pages->applylimit($criteria);$model = DnOnline::model()->findAll($criteria);
记得控制器里有个函数paginate($itemCount,$pageSize=null,$pageVar=null)
CDB写法： $criteria = new CDbCriteria;$sql = "SELECT * FROM USER";$model= Yii::app()->db->createCommand($sql)->queryAll();$pages = new CPagination(count($model)); $pages->pageSize = 4;$pages->applylimit($criteria);$model=Yii::app()->db->createCommand($sql." LIMIT :offset,:limit");$model->bindValue(':offset', $pages->currentPage*$pages->pageSize);$model->bindValue(':limit', $pages->pageSize);$model=$model->queryAll();或者: $criteria = new CDbCriteria; $connection=Yii::app()->db; $sql="SELECT u.account,i.* FROM sys_user as u left join user_info as i on u.id=i.user_id "; $model= Yii::app()->db->createCommand($sql)->queryAll(); $pages = new CPagination(count($model)); $pages->pageSize = 4; $pages->applylimit($criteria); $model=Yii::app()->db->createCommand($sql." LIMIT :offset,:limit"); $model->bindValue(':offset', $pages->currentPage*$pages->pageSize); $model->bindValue(':limit', $pages->pageSize); $model=$model->queryAll();
======================================== 一、查询数据集合
1、$admin=Admin::model()->findAll ($condition,$params);该方法是根据一个条件查询一个集合，如： findAll("username=:name",array(":name"=>$username)); 2、$admin=Admin::model()->findAllByPk($postIDs,$condition,$params);findAllByPk($id,"name like ':name' and age=:age",array(':name'=>$name,'age'=>$age)); 该方法是根据主键查询一个集合，可以使用多个主键,如： findAllByPk(array(1,2)); 3、$admin=Admin::model()->findAllByAttributes($attributes,$condition,$params);该方法是根据条件查询一个集合，可以是多个条件，把条件放到数组里面，如： findAllByAttributes(array('username'=>'admin')); 4、$admin=Admin::model()->findAllBySql($sql,$params);该方法是根据SQL语句查询一个数组,如：findAllBySql("select *from admin whereusername=:name",array(':name'=>'admin'));======================================== 二、查询对像 的方法 1、$admin=Admin::model()->findByPk ($postID,$condition,$params); 根据主键查询出一个对象,如：findByPk(1);
2、$row=Admin::model()->find ($condition,$params); 根据一个条件查询出一组数据，可能是多个，但是他只返回第一行数据,如：find('username=:name',array(':name'=>'admin'));
$userinfo=Userinfo::model()->find(array('condition'=>'user_id=:user_id','params'=>array(':user_id'=>$uid)));
print_r($userinfo->user_id);
3、$admin=Admin::model()->findByAttributes ($attributes,$condition,$params); 该方法是根据条件查询一组数据，可以是多个条件，把条件放到数组里面，他查询的也是第一条数据，如：findByAttributes(array('username'=>'admin')); 4、$admin=Admin::model()->findBySql ($sql,$params); 该方法是根据SQL语句查询一组数据,他查询的也是第一条数据，如： findBySql("select *from admin whereusername=:name",array(':name'=>'admin')); 5、拼一个获得SQL的方法，在根据find查询出一个对象 $criteria=new CDbCriteria; $criteria->select='username'; // only select the 'title' column $criteria->condition='username=:username';$criteria->params=array(':username=>'admin');$post=Post::model()->find($criteria); // $params isnot needed ======================================== 三、查询个数，判断查询是否有结果 1、$n=Post::model()->count ($condition,$params); 该方法是根据一个条件查询一个集合有多少条记录，返回一个int型数字,如 count("username=:name",array(":name"=>$username)); 2、$n=Post::model()->countBySql ($sql,$params); 该方法是根据SQL语句查询一个集合有多少条记录，返回一个int型数字,如countBySql("select *from admin whereusername=:name",array(':name'=>'admin')); 3、$exists=Post::model()->exists($condition,$params); 该方法是根据一个条件查询查询得到的数组有没有数据，如果有数据返回一个true，否则没有找到
$sql = "select count(*) as count from " . $this->tableName() . " where user_id = $userId";
$query = $result->queryAll(); $pageSize =10; $count = $query [0] ['count']; $pageCount = ceil($count / $pageSize); return $pageCount; ======================================== 四、添加的方法 $admin=newAdmin; $admin->username=$username;$admin->password=$password;if($admin->save ()>0){ echo "添加成功"; }else{ echo "添加失败"; }
$userLimit = new UserLimit();
$userLimit->item = 0.30000;if($userLimit->insert (){
}
======================================== 五、修改的方法$userLimitRet = UserLimit::model()->findByPk (array ( 'user_id' => $userId, 'category_id' => $v ));$userLimitRet->order = $order;
if (! $userLimitRet->update ()) {
}
$userAmount=userAmount::model()->findByPk ($userId);
$userAmount->credit=Yii::app()->request->getParam('credit',10000);$ret = $userAmount->save ();
1、Post::model()->updateAll ($attributes,$condition,$params); $count =Admin::model()->updateAll(array('username'=>'11111','password'=>'11111'),'password=:pass',array(':pass'=>'1111a1'));if($count>0){ echo "修改成功"; }else{ echo "修改失败"; }
$ret = $this->updateAll (array (
'set' => $Set ), " user_id in ( " . $userIds . " ) and category_id = " . $categoryId);if($ret){
return true;}else { return false;}
2、Post::model()->updateByPk ($pk,$attributes,$condition,$params); $count =Admin::model()->updateByPk(1,array('username'=>'admin','password'=>'admin'));$count =Admin::model()->updateByPk(array(1,2),array('username'=>'admin','password'=>'admin'),'username=:name',array(':name'=>'admin'));if($count>0){ echo "修改成功"; }else{ echo "修改失败"; } $pk代表主键，可以是一个也可以是一个集合，$attributes代表是要修改的字段的集合，$condition代表条件，$params传入的值 3、Post::model()->updateCounters ($counters,$condition,$params); $count=Admin::model()->updateCounters(array('status'=>1),'username=:name',array(':name'=>'admin'));if($count>0){ echo "修改成功"; }else{ echo "修改失败"; } array('status'=>1)代表数据库中的admin表根据条件username='admin'，查询出的所有结果status字段都自加1 ======================================== 六、删除的方法 1、Post::model()->deleteAll($condition,$params); $count = Admin::model()->deleteAll('username=:nameandpassword=:pass',array(':name'=>'admin',':pass'=>'admin')); $id=1,2,3 deleteAll('id in(".$id.")');删除id为这些的数据if($count>0){ echo "删除成功"; }else{ echo "删除失败"; } 2、Post::model()->deleteByPk($pk,$condition,$params);$count = Admin::model()->deleteByPk(1);$count =Admin::model()->deleteByPk(array(1,2),'username=:name',array(':name'=>'admin'));if($count>0){ echo "删除成功"; }else{ echo "删除失败"; }