摘要：根據(jù)條件查詢一個(gè)集合根據(jù)主鍵查詢一個(gè)集合可以使用多個(gè)主鍵根據(jù)條件查詢一個(gè)集合可以是多個(gè)條件把條件放到數(shù)組里面根據(jù)語(yǔ)句查詢一個(gè)數(shù)組根據(jù)主鍵查詢出一個(gè)對(duì)象根據(jù)條件查詢出一組數(shù)據(jù)可能是多個(gè)但是他只返回第一行數(shù)據(jù)根據(jù)

1、根據(jù)條件查詢一個(gè)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(jù)主鍵查詢一個(gè)集合,可以使用多個(gè)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(jù)條件查詢一個(gè)集合,可以是多個(gè)條件,把條件放到數(shù)組里面 findAllByAttributes

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

4、根據(jù)SQL語(yǔ)句查詢一個(gè)數(shù)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(jù)主鍵查詢出一個(gè)對(duì)象 eg：findByPk(1);

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

6、根據(jù)條件查詢出一組數(shù)據(jù),【可能是多個(gè),但是他只返回第一行數(shù)據(jù)】

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

7、根據(jù)條件查詢一組數(shù)據(jù),【可以是多個(gè)條件,把條件放到數(shù)組里面,查詢的也是第一條數(shù)據(jù)】

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

8、根據(jù)SQL語(yǔ)句查詢一組數(shù)據(jù),【查詢的也是第一條數(shù)據(jù)】

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

9、通過(guò)CDbCriteria類find查詢出一個(gè)對(duì)象

$criteria=new CDbCriteria; 
$criteria->select="username"; // 限制顯示哪些字段 
$criteria->condition="username=:username";     //一個(gè)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(yǔ)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(jù)你的參數(shù)自動(dòng)處理成addCondition或者addInCondition.
$criteria->compare("postid", array(1,2,3));   //數(shù)組就會(huì)調(diào)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(diào)用relations  
$criteria->limit = 10;    //取1條數(shù)據(jù)，如果小于0，則不作處理 
$criteria->offset = 1;   //兩條合并起來(lái)，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(gè)數(shù),判斷查詢是否有結(jié)果

根據(jù)一個(gè)條件查詢一個(gè)集合有多少條記錄,返回一個(gè)int型數(shù)字

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

根據(jù)SQL語(yǔ)句查詢一個(gè)集合有多少條記錄,返回一個(gè)int型數(shù)字

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

根據(jù)一個(gè)條件查詢查詢得到的數(shù)組有沒(méi)有數(shù)據(jù),有數(shù)據(jù)返回一個(gè)true,否則沒(méi)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(shù)據(jù)庫(kù)中的post表根據(jù)條件username="jack",查詢出的所有結(jié)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"));
$count = Post::model()->deleteAll("postid in("1,2,3")");//刪除postid為這些的數(shù)據(jù)
if($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(zhí)行原生的SQL語(yǔ)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(wù)處理 【多表更新插入操作請(qǐng)使用事務(wù)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(wù)回滾");
                }
                $recordCounter = Counter::model()->updateByPk(1,array("max_id"=>$orderId));
                if($recordCounter <= 0 )
                    throw new CException("訂單計(jì)數(shù)器更新失敗,通知事務(wù)回滾");
                $transaction->commit(); //提交事務(wù)會(huì)真正的執(zhí)行數(shù)據(jù)庫(kù)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();
   
}