Yii 1.0数据库操作 查询、增加、更新、删除

本文原地址：http://www.aipanshi.com/post/2.html

1、根据条件查询一个集合

$objectResult=Post::model()->findAll($condition,$params); 

$objectResult=Post::model()->findAll("username=:name",array(":name"=>$username)); 

$objectResult=RepairItem::model()->findAll("orderno=:orderno and orderpostid=:orderpostid",array(":orderno"=>$orderInfo['orderno'],':orderpostid'=>$orderInfo['orderpostid'])); 

$infoArr = NewsList::model()->findAll("status = '1' ORDER BY postid DESC limit 10 "); 

2、根据主键查询一个集合,可以使用多个主键 findAllByPk

$objectResult=Post::model()->findAllByPk($postIDs,$condition,$params); 

$objectResult=Post::model()->findAllByPk($postid,"name like :name and age=:age",array(':name'=>$name,'age'=>$age));$objectResult=Post::model()->findAllByPk(array(1,2)); 

3、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 findAllByAttributes

$objectResult=Post::model()->findAllByAttributes($attributes,$condition,$params);

$objectResult=Post::model()->findAllByAttributes(array('username'=>'jack')); 

4、根据SQL语句查询一个数组 findAllBySql

$arrResult=Post::model()->findAllBySql($sql,$params); 

$arrResult=Post::model()->findAllBySql("select * from tbl_post where username like :name",array(':name'=>'?%'));

5、根据主键查询出一个对象 eg：findByPk(1);

$arrResult=Post::model()->findByPk($postID,$condition,$params);$arrResult=Post::model()->findByPk(1);

6、根据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】

$arrRow=Post::model()->find($condition,$params);$arrRow=Post::model()->find('username=:name',array(':name'=>'jack'));

7、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,查询的也是第一条数据】

$objectResult=Post::model()->findByAttributes($attributes,$condition,$params);$objectResult=Post::model()->findByAttributes(array('username'=>'objectResult')); 

8、根据SQL语句查询一组数据,【查询的也是第一条数据】

$objectResult=Post::model()->findBySql($sql,$params);$objectResult=Post::model()->findBySql("select * from objectResult where username=:name",array(':name'=>'objectResult')); 

9、通过CDbCriteria类find查询出一个对象 

$criteria=new CDbCriteria;  

$criteria->select='username'; 

// 限制显示哪些字段  

$criteria->condition='username=:username';     

//一个查询条件用aCondition.多条件用addCondition$criteria->params=array(":username=>'jack'"); 

$criteria->order = "postsort DESC";

 $criteria->limit = "3"; 

$post=Post::model()->find($criteria);  

10、多条件查询的语句

$criteria = new CDbCriteria;      

$criteria->addCondition("postid=1"); 

//等同于 where postid = 1  

$criteria->addInCondition('postid', array(1,2,3,4,5)); 

//等同于 where postid IN (1,2,3,4,5,);  

$criteria->addNotInCondition('postid', array(1,2,3,4,5));

//等同于 NOT IN (1,2,3,4,5,) 

$criteria->addCondition('postid=1','OR');

//等同于 OR而非AND  

$criteria->addSearchCondition('username', 'jack');

//等同于 where name like '%jack%'  

$criteria->addBetweenCondition('postid', 1, 4);

// 等同于 between 1 and 4$criteria->compare('postid', 1);    

//根据你的参数自动处理成addCondition或者addInCondition.$criteria->compare('postid', array(1,2,3));   

//数组就会调用addInCondition    

$criteria->select = 'postid,parentid,name'; 

//限制显示哪些字段  

$criteria->join = 'xxx'; 

//连接表 $criteria->with = 'xxx'; 

//调用relations   

$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

三、查询个数,判断查询是否有结果

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 

$intCount=Post::model()->count($condition,$params); 

$intCount=Post::model()->count("username=:name",array(":name"=>$username));  

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 

$intCount=Post::model()->countBySql($sql,$params); 

$intCount=Post::model()->countBySql("select * from objectResult where username=:name",array(':name'=>'objectResult'));  

根据一个条件查询查询得到的数组有没有数据,有数据返回一个true,否则没有找到 

$boolExists=Post::model()->exists($condition,$params); 

$boolExist=Post::model()->exists("name=:name",array(":name"=>$username));

四、添加的方法

$objectPost = new Post;        

$objectPost->username = $username; 

$objectPost->password = $password; 

或许 

$objectPost->attributes = $arrNewData; 

if($objectPost->save()){    

$intPostId= $objectPost->primaryKey; 

//生成主键id   

echo "添加成功"; 

}else{    

echo "添加失败"; 

}

五、修改的方法

Post::model()->updateAll($attributes,$condition,$params); 

$count =Post::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";

 } 

$rt = PostList::model()->updateAll(array('status'=>'1'),'staff_postid=:staff AND host_postid=:host',array(':staff'=>$staff_postid,':host'=>$host_postid));Post::model()->updateByPk($pk,$attributes,$condition,$params);$count=Post::model()->updateByPk(1,array('username'=>'jack','password'=>'jack')); 

$count=Post::model()->updateByPk(array(1,2),array('username'=>'jack1','password'=>'jack1'),'username=:name',array(':name'=>'jack')); 

if($count > 0){   

 echo "修改成功"; 

}else{   

 echo "修改失败";

 } 

Post::model()->updateCounters($counters,$condition,$params);$count=Post::model()->updateCounters(array('status'=>1),'username=:name',array(':name'=>'jack'));

 if($count > 0){    

echo "修改成功"; 

}else{   

 echo "修改失败"; 

}

 //array('status'=>1)代表数据库中的post表根据条件username='jack',查询出的所有结果status字段都自加1

六、删除的方法

//deleteAllPost::model()->deleteAll($condition,$params); 

$count = Post::model()->deleteAll('username=:name and password=:pass',array(':name'=>'jack',':pass'=>'jack')); 

$count = Post::model()->deleteAll('postid in("1,2,3")');

//删除postid为这些的数据 

if($count>0){    

echo "删除成功"; 

}else{    

echo "删除失败"; 

}  

//deleteByPk 

Post::model()->deleteByPk($pk,$condition,$params); 

$count = Post::model()->deleteByPk(1); 

$count =Post::model()->deleteByPk(array(1,2),'username=:name',array(':name'=>'jack')); 

if($count>0){    

echo "删除成功";

 }else{   

 echo "删除失败"; 

}

七、执行原生的SQL语句

$sql = "select t.*, t1.userphone, t1.truename, t1.usermail from {{member_contact}} t left join {{member}} t1 on t.userid = t1.userid where t.contactid in (1,2,3)"; 

$arrRows=Yii::app()->db->createCommand($sql)->query(); 

foreach ($arrRows as $k => $v){  }

八、事务处理 【多表更新插入操作请使用事务处理】

$transaction = Yii::app()->db->beginTransaction(); 

try{                

$arrOrderProfile = array(                    

'orderid'=> $orderId,                   

'userip'=> $userip,

        'contactid' => $contactId,

'updatetime'=> $now 

);                

$modelOrderProfile = new RepairOrderProfile();

    $modelOrderProfile->attributes = $arrOrderProfile;

if(!$modelOrderProfile->save()){ 

throw new CException('维修订单生成失败,通知事务回滚');

}                

$recordCounter = Counter::model()->updateByPk(1,array('max_id'=>$orderId));

    if($recordCounter <= 0 ) 

throw new CException('订单计数器更新失败,通知事务回滚');

$transaction->commit(); //提交事务会真正的执行数据库操作 

}catch(Exception $e){

file_put_contents('action.log', $e->getCode().':'.$e->getMessage().'--'.date('Y-m-d H:i:s',time()),FILE_APPEND);    $transaction->rollback();

}