Yii CDbCriteria常用用法

$criteria = new CDbCriteria;
$criteria->compare('name',$this->name,true,'OR'); //like部分匹配
//$criteria->addCondition("id=1"); //查询条件，即where id = 1
//$criteria->addInCondition('id', array(1,2,3,4,5)); //代表where id IN (1,2,3,4,5);
$criteria->compare('name', array(1,2,3,4,5));
$criteria->addNotInCondition('id', array(1,2,3,4,5));//与上面正好相法，是NOT IN
//$criteria->addCondition('id=1','OR');//这是OR条件，多个条件的时候，该条件是OR而非AND
//$criteria->addSearchCondition('name', '分类');//搜索条件，其实代表了。where name like '%分类%'
$criteria->compare("id","<>1"); //not like
$criteria->addBetweenCondition('id', 1, 4);//between 1 and 4
$criteria->compare('id', 1); //这个方法比较特殊，他会根据你的参数自动处理成addCondition或者addInCondition，
$criteria->compare("id","<1"); //这个方法他会根据你提供的条件进行判断
//即如果第二个参数是数组就会调用addInCondition

推荐compare,搜索条件允许为空因此不需要加条件

$criteria = new CDbCriteria;
$criteria->alias = 't';  //table t，默认select='*';
//一些public vars 
$criteria->select = 'id,parentid,name'; //代表了要查询的字段，默认select='*';  
$criteria->join = 'xxx'; //连接表  
$criteria->with = 'xxx'; //调用relations   $criteria->with = array('accounts','varchar');
$criteria->with  = array('teacher'=>
	array('select'=>'username,company_id',
	 'order'=>'teacher.username ASC')
);
$criteria->limit = 10;    //取1条数据，如果小于0，则不作处理  
$criteria->offset = 1;   //两条合并起来，则表示 limit 10 offset 1,或者代表了。limit 1,10  
$criteria->order = 'xxx DESC,XXX ASC' ;//排序条件  
$criteria->group = 'group 条件';  
$criteria->having = 'having 条件 ';  
$criteria->distinct = FALSE; //是否唯一查询
Article::model()->findAll($criteria);

DAO

$sql ='  ...  yiiblog_desc like :keywords or yiiblog_title like :keywords ... ';
$TmpStatement = Yii::app()->db->createCommand($sql);
$TmpStatement->bindValue(':keywords', '%'.$keywords.'%');
findAll('username like :username ' ,array(":username"=>"%$key%"));