對象操做sql
查詢數據庫
1 //1.簡單查詢 2 $admin=Admin::model()->findAll($condition,$params); 3 $admin=Admin::model()->findAll("username=:name",array(":name"=>$username)); 4 5 $infoArr= NewsList::model()->findAll("status = '1' ORDER BY id DESC limit 10 "); 6 7 //2. findAllByPk(該方法是根據主鍵查詢一個集合,可使用多個主鍵) 8 $admin=Admin::model()->findAllByPk($postIDs,$condition,$params); 9 $admin=Admin::model()->findAllByPk($id,"name like :name and age=:age",array(':name'=>$name,'age'=>$age)); 10 $admin=Admin::model()->findAllByPk(array(1,2)); 11 12 //3.findAllByAttributes (該方法是根據條件查詢一個集合,能夠是多個條件,把條件放到數組裏面) 13 $admin=Admin::model()->findAllByAttributes($attributes,$condition,$params); 14 $admin=Admin::model()->findAllByAttributes(array('username'=>'admin')); 15 16 //4.findAllBySql (該方法是根據SQL語句查詢一個數組) 17 $admin=Admin::model()->findAllBySql($sql,$params); 18 $admin=Admin::model()->findAllBySql("select * from admin where username like :name",array(':name'=>'%ad%')); 19 User::find()->all(); 此方法返回全部數據; 20 User::findOne($id); 此方法返回 主鍵 id=1 的一條數據(舉個例子); 21 User::find()->where(['name' => '小夥兒'])->one(); 此方法返回 ['name' => '小夥兒'] 的一條數據; 22 User::find()->where(['name' => '小夥兒'])->all(); 此方法返回 ['name' => '小夥兒'] 的全部數據; 23 User::find()->orderBy('id DESC')->all(); 此方法是排序查詢; 24 User::findBySql('SELECT * FROM user')->all(); 此方法是用 sql 語句查詢 user 表裏面的全部數據; 25 User::findBySql('SELECT * FROM user')->one(); 此方法是用 sql 語句查詢 user 表裏面的一條數據; 26 User::find()->andWhere(['sex' => '男', 'age' => '24'])->count('id'); 統計符合條件的總條數; 27 User::find()->one(); 此方法返回一條數據; 28 User::find()->all(); 此方法返回全部數據; 29 User::find()->count(); 此方法返回記錄的數量; 30 User::find()->average(); 此方法返回指定列的平均值; 31 User::find()->min(); 此方法返回指定列的最小值 ; 32 User::find()->max(); 此方法返回指定列的最大值 ; 33 User::find()->scalar(); 此方法返回值的第一行第一列的查詢結果; 34 User::find()->column(); 此方法返回查詢結果中的第一列的值; 35 User::find()->exists(); 此方法返回一個值指示是否包含查詢結果的數據行; 36 User::find()->batch(10); 每次取 10 條數據 37 User::find()->each(10); 每次取 10 條數據, 迭代查詢 38 2、查詢對象的方法 39 //根據主鍵查詢出一個對象,如:findByPk(1); 40 $admin=Admin::model()->findByPk($postID,$condition,$params); 41 $admin=Admin::model()->findByPk(1); 42 43 //根據一個條件查詢出一組數據,多是多個,可是他只返回第一行數據 44 $row=Admin::model()->find($condition,$params); 45 $row=Admin::model()->find('username=:name',array(':name'=>'admin')); 46 47 //該方法是根據條件查詢一組數據,能夠是多個條件,把條件放到數組裏面,查詢的也是第一條數據 48 $admin=Admin::model()->findByAttributes($attributes,$condition,$params); 49 $admin=Admin::model()->findByAttributes(array('username'=>'admin')); 50 51 //該方法是根據SQL語句查詢一組數據,他查詢的也是第一條數據 52 $admin=Admin::model()->findBySql($sql,$params); 53 $admin=Admin::model()->findBySql("select * from admin where username=:name",array(':name'=>'admin')); 54 55 //拼一個得到SQL的方法,在根據find查詢出一個對象 56 $criteria=newCDbCriteria; 57 $criteria->select='username';// only select the 'title' column 58 $criteria->condition='username=:username'; //請注意,這是一個查詢的條件,且只有一個查詢條件.多條件用addCondition 59 $criteria->params=array(":username=>'admin'"); 60 $criteria->order ="id DESC"; 61 $criteria->limit ="3"; 62 $post=Post::model()->find($criteria);// $params isnot needed 63 64 //多條件查詢的語句 65 $criteria= new CDbCriteria; 66 $criteria->addCondition("id=1");//查詢條件,即where id = 1 67 $criteria->addInCondition('id',array(1,2,3,4,5));//表明where id IN (1,2,3,4,5,); 68 $criteria->addNotInCondition('id',array(1,2,3,4,5));//與上面正好相法,是NOT IN 69 $criteria->addCondition('id=1','OR');//這是OR條件,多個條件的時候,該條件是OR而非AND 70 $criteria->addSearchCondition('name','分類');//搜索條件,其實表明了。。where name like '%分類%' 71 $criteria->addBetweenCondition('id', 1, 4);//between 1 and 4 72 $criteria->compare('id', 1); //這個方法比較特殊,他會根據你的參數自動處理成addCondition或者addInCondition. 73 $criteria->compare('id',array(1,2,3)); //即若是第二個參數是數組就會調用addInCondition 74 75 76 $criteria->select ='id,parentid,name';//表明了要查詢的字段,默認select='*'; 77 $criteria->join ='xxx'; //鏈接表 78 $criteria->with ='xxx'; //調用relations 79 $criteria->limit = 10; //取1條數據,若是小於0,則不做處理 80 $criteria->offset = 1; //兩條合併起來,則表示 limit 10 offset 1,或者表明了。limit 1,10 81 $criteria->order ='xxx DESC,XXX ASC' ;//排序條件 82 $criteria->group ='group 條件'; 83 $criteria->having ='having 條件 '; 84 $criteria->distinct = FALSE;//是否惟一查詢 85 3、查詢個數,判斷查詢是否有結果 86 //該方法是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 87 $n=Post::model()->count($condition,$params); 88 $n=Post::model()->count("username=:name",array(":name"=>$username)); 89 90 //該方法是根據SQL語句查詢一個集合有多少條記錄,返回一個int型數字 91 $n=Post::model()->countBySql($sql,$params); 92 $n=Post::model()->countBySql("select * from admin where username=:name",array(':name'=>'admin')); 93 94 //該方法是根據一個條件查詢查詢獲得的數組有沒有數據,若是有數據返回一個true,不然沒有找到 95 $exists=Post::model()->exists($condition,$params); 96 $exists=Post::model()->exists("name=:name",array(":name"=>$username)); 97 4、新增 98 $admin= new Admin; 99 $admin->username =$username; 100 $admin->password =$password; 101 if($admin->save() > 0){echo "添加成功"; }else{echo "添加失敗"; } 102 5、修改 103 Post::model()->updateAll($attributes,$condition,$params); 104 $count=Admin::model()->updateAll(array('username'=>'11111','password'=>'11111'),'password=:pass',array(':pass'=>'1111a1')); 105 if($count> 0){ echo "修改爲功"; }else{echo "修改失敗"; } 106 107 $rt= PostList::model()->updateAll(array('status'=>'1'),'staff_id=:staff AND host_id=:host',array(':staff'=>$staff_id,':host'=>$host_id)); 108 109 //$pk主鍵,能夠是一個也能夠是一個集合,$attributes是要修改的字段的集合,$condition條件,$params傳入的值 110 Post::model()->updateByPk($pk,$attributes,$condition,$params); 111 $count=Admin::model()->updateByPk(1,array('username'=>'admin','password'=>'admin')); 112 $count=Admin::model()->updateByPk(array(1,2),array('username'=>'admin','password'=>'admin'),'username=:name',array(':name'=>'admin')); 113 if($count>0){echo "修改爲功"; }else{echo "修改失敗"; } 114 115 Post::model()->updateCounters($counters,$condition,$params); 116 $count=Admin::model()->updateCounters(array('status'=>1),'username=:name',array(':name'=>'admin')); 117 if($count> 0){ echo "修改爲功"; }else{echo "修改失敗"; } 118 //array('status'=>1)表明數據庫中的admin表根據條件username='admin',查詢出的全部結果status字段都自加1 119 6、刪除 120 //deleteAll 121 Post::model()->deleteAll($condition,$params); 122 $count= Admin::model()->deleteAll('username=:name and password=:pass',array(':name'=>'admin',':pass'=>'admin')); 123 $count= Admin::model()->deleteAll('id in("1,2,3")');//刪除id爲這些的數據 124 if($count>0){echo"刪除成功"; }else{echo "刪除失敗"; } 125 126 //deleteByPk 127 Post::model()->deleteByPk($pk,$condition,$params); 128 $count= Admin::model()->deleteByPk(1); 129 $count=Admin::model()->deleteByPk(array(1,2),'username=:name',array(':name'=>'admin')); 130 if($count>0){echo "刪除成功"; }else{echo "刪除失敗"; }
直接數據庫操做數組
查詢app
1 //createCommand(執行原生的SQL語句) 2 $sql= "SELECT u.account,i.* FROM sys_user as u left join user_info as i on u.id=i.user_id"; 3 $rows=Yii::$app->db->createCommand($sql)->query(); 4 foreach($rows as $k => $v){ 5 echo$v['add_time']; 6 } 7 8 查詢返回多行: 9 10 $command = $connection->createCommand('SELECT * FROM post'); 11 $posts = $command->queryAll(); 12 返回單行: 13 14 $command = $connection->createCommand('SELECT * FROM post WHERE id=1'); 15 $post = $command->queryOne(); 16 查詢多行單值: 17 18 $command = $connection->createCommand('SELECT title FROM post'); 19 $titles = $command->queryColumn(); 20 查詢標量值/計算值: 21 22 $command = $connection->createCommand('SELECT COUNT(*) FROM post'); 23 $postCount = $command->queryScalar();
更新post
1 $command = $connection->createCommand('UPDATE post SET status=1 WHERE id=1'); 2 $command->execute();
插入更新刪除this
1 // INSERT 2 $connection->createCommand()->insert('user', [ 3 'name' => 'Sam', 4 'age' => 30, 5 ])->execute(); 6 7 // INSERT 一次插入多行 8 $connection->createCommand()->batchInsert('user', ['name', 'age'], [ 9 ['Tom', 30], 10 ['Jane', 20], 11 ['Linda', 25], 12 ])->execute(); 13 14 // UPDATE 15 $connection->createCommand()->update('user', ['status' => 1], 'age > 30')->execute(); 16 17 // DELETE 18 $connection->createCommand()->delete('user', 'status = 0')->execute();
事務spa
1 //事務的基本結構(多表更新插入操做請使用事務處理) 2 $dbTrans= Yii::app()->db->beginTransaction(); 3 try{ 4 $post= new Post; 5 $post->'title'= 'Hello dodobook!!!'; 6 if(!$post->save())throw newException("Error Processing Request", 1); 7 $dbTrans->commit(); 8 // $this->_end(0,'添加成功!!!'); 9 }catch(Exception$e){ 10 $dbTrans->rollback(); 11 // $this->_end($e->getCode(),$e->getMessage());