摘要：根據條件查詢一個集合根據主鍵查詢一個集合可以使用多個主鍵根據條件查詢一個集合可以是多個條件把條件放到數組里面根據語句查詢一個數組根據主鍵查詢出一個對象根據條件查詢出一組數據可能是多個但是他只返回第一行數據根據

1、根據條件查詢一個集合

$objectResult=Post::model()->findAll($condition,$params);
$oClasses = classes::model()->findAll(array(
            "select"=>"classId,className,grade,type,status",
            "condition"=>"classId=21 and grade=1",
            "order"=>"createtime desc",
        ));
$objectResult=Post::model()->findAll("username=:name",array(":name"=>$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、根據主鍵查詢一個集合,可以使用多個主鍵 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、根據條件查詢一個集合,可以是多個條件,把條件放到數組里面 findAllByAttributes

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

4、根據SQL語句查詢一個數組 findAllBySql

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

5、根據主鍵查詢出一個對象 eg：findByPk(1);

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

6、根據條件查詢出一組數據,【可能是多個,但是他只返回第一行數據】

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

7、根據條件查詢一組數據,【可以是多個條件,把條件放到數組里面,查詢的也是第一條數據】

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

8、根據SQL語句查詢一組數據,【查詢的也是第一條數據】

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

9、通過CDbCriteria類find查詢出一個對象

$criteria=new CDbCriteria; 
$criteria->select="username"; // 限制顯示哪些字段 
$criteria->condition="username=:username";     //一個查詢條件用aCondition.多條件用addCondition
$criteria->params=array(":username=>"jack"");
$criteria->order = "postsort DESC";
$criteria->limit = "3";
$post=Post::model()->find($criteria);

10、多條件查詢的語句

$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);    //根據你的參數自動處理成addCondition或者addInCondition.
$criteria->compare("postid", array(1,2,3));   //數組就會調用addInCondition 
 
 
$criteria->select = "postid,parentid,name"; //限制顯示哪些字段 
$criteria->join = "xxx"; //連接表 
$criteria->with = "xxx"; //調用relations  
$criteria->limit = 10;    //取1條數據，如果小于0，則不作處理 
$criteria->offset = 1;   //兩條合并起來，則表示 limit 10 offset 1,或者代表了。limit 1,10 
$criteria->order = "xxx DESC,XXX ASC" ;//排序條件 
$criteria->group = "group 條件"; 
$criteria->having = "having 條件 "; 
$criteria->distinct = FALSE; //是否唯一查詢

三、查詢個數,判斷查詢是否有結果

根據一個條件查詢一個集合有多少條記錄,返回一個int型數字

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

根據SQL語句查詢一個集合有多少條記錄,返回一個int型數字

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

根據一個條件查詢查詢得到的數組有沒有數據,有數據返回一個true,否則沒有找到

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

或許

$objectPost->attributes = $arrNewData;

if($objectPost->save()){
    $intPostId= $objectPost->primaryKey; //生成主鍵id
    echo "添加成功";
}else{
    echo "添加失敗";
}

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 "修改失敗";
}
 
$rt = PostList::model()->updateAll(array("status"=>"1"),"staff_postid=:staff AND host_postid=:host",array(":staff"=>$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 "修改失敗";
}
 
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 "修改失敗";
}
//array("status"=>1)代表數據庫中的post表根據條件username="jack",查詢出的所有結果status字段都自加1

六、刪除的方法

//deleteAll
Post::model()->deleteAll($condition,$params);
$count = Post::model()->deleteAll("username=:name and password=:pass",array(":name"=>"jack",":pass"=>"jack"));
$count = Post::model()->deleteAll("postid in("1,2,3")");//刪除postid為這些的數據
if($count>0){
    echo "刪除成功";
}else{
    echo "刪除失敗";
}
 
//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 "刪除成功";
}else{
    echo "刪除失敗";
}}

七、執行原生的SQL語句

$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、事務處理 【多表更新插入操作請使用事務處理】

$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("維修訂單生成失敗,通知事務回滾");
                }
                $recordCounter = Counter::model()->updateByPk(1,array("max_id"=>$orderId));
                if($recordCounter <= 0 )
                    throw new CException("訂單計數器更新失敗,通知事務回滾");
                $transaction->commit(); //提交事務會真正的執行數據庫操作
}catch(Exception $e){
    file_put_contents("action.log", $e->getCode().":".$e->getMessage()."--".date("Y-m-d H:i:s",time()),FILE_APPEND);
    $transaction->rollback();
   
}