1 //1.该方法是根据一个条件查询一个集合 2 $admin=Admin::model()->findAll($condition,$params); 3 $admin=Admin::model()->findAll("username=:name",array(":name"=>$username)); 4   5 //2. findAllByPk(该方法是根据主键查询一个集合,可以使用多个主键) 6 $admin=Admin::model()->findAllByPk($postIDs,$condition,$params); 7 $admin=Admin::model()->findAllByPk($id,"name like :name and age=:age",array(‘:name‘=>$name,‘age‘=>$age)); 8 $admin=Admin::model()->findAllByPk(array(1,2)); 9  10 //3.findAllByAttributes (该方法是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)11 $admin=Admin::model()->findAllByAttributes($attributes,$condition,$params);12 $admin=Admin::model()->findAllByAttributes(array(‘username‘=>‘admin‘));13  14 //4.findAllBySql (该方法是根据SQL语句查询一个数组)15 $admin=Admin::model()->findAllBySql($sql,$params);16 $admin=Admin::model()->findAllBySql("select * from admin where username like :name",array(‘:name‘=>‘%ad%‘)); 

 1 //根据主键查询出一个对象,如：findByPk(1);  2 $admin=Admin::model()->findByPk($postID,$condition,$params);  3 $admin=Admin::model()->findByPk(1); 4   5 //根据一个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 6 $row=Admin::model()->find($condition,$params); 7 $row=Admin::model()->find(‘username=:name‘,array(‘:name‘=>‘admin‘)); 8   9 //该方法是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10 $admin=Admin::model()->findByAttributes($attributes,$condition,$params);11 $admin=Admin::model()->findByAttributes(array(‘username‘=>‘admin‘));12  13 //该方法是根据SQL语句查询一组数据,他查询的也是第一条数据14 $admin=Admin::model()->findBySql($sql,$params); 15 $admin=Admin::model()->findBySql("select * from admin where username=:name",array(‘:name‘=>‘admin‘));16  17 //拼一个获得SQL的方法,在根据find查询出一个对象  18 $criteria=new CDbCriteria;  19 $criteria->select=‘username‘; // only select the ‘title‘ column  20 $criteria->condition=‘username=:username‘; 21 $criteria->params=array(":username=>‘admin‘"); 22 $criteria->order = "id DESC";23 $criteria->limit = "3";24 $post=Post::model()->find($criteria); // $params isnot needed  

 1 //该方法是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 2 $n=Post::model()->count($condition,$params);  3 $n=Post::model()->count("username=:name",array(":name"=>$username)); 4   5 //该方法是根据SQL语句查询一个集合有多少条记录,返回一个int型数字 6 $n=Post::model()->countBySql($sql,$params); 7 $n=Post::model()->countBySql("select * from admin where username=:name",array(‘:name‘=>‘admin‘)); 8   9 //该方法是根据一个条件查询查询得到的数组有没有数据,如果有数据返回一个true,否则没有找到10 $exists=Post::model()->exists($condition,$params);11 $exists=Post::model()->exists("name=:name",array(":name"=>$username));

1 $admin = new Admin;        2 $admin->username = $username; 3 $admin->password = $password; 4 if($admin->save() > 0){ echo "添加成功"; }else{ echo "添加失败"; }

 1 Post::model()->updateAll($attributes,$condition,$params);  2 $count =Admin::model()->updateAll(array(‘username‘=>‘11111‘,‘password‘=>‘11111‘),‘password=:pass‘,array(‘:pass‘=>‘1111a1‘));  3 if($count > 0){ echo "修改成功"; }else{ echo "修改失败"; } 4   5 //$pk主键,可以是一个也可以是一个集合,$attributes是要修改的字段的集合,$condition条件,$params传入的值  6 Post::model()->updateByPk($pk,$attributes,$condition,$params);  7 $count =Admin::model()->updateByPk(1,array(‘username‘=>‘admin‘,‘password‘=>‘admin‘));  8 $count =Admin::model()->updateByPk(array(1,2),array(‘username‘=>‘admin‘,‘password‘=>‘admin‘),‘username=:name‘,array(‘:name‘=>‘admin‘));  9 if($count>0){ echo "修改成功"; }else{ echo "修改失败"; }10  11 Post::model()->updateCounters($counters,$condition,$params); 12 $count=Admin::model()->updateCounters(array(‘status‘=>1),‘username=:name‘,array(‘:name‘=>‘admin‘)); 13 if($count > 0){ echo "修改成功"; }else{ echo "修改失败"; }14 //array(‘status‘=>1)代表数据库中的admin表根据条件username=‘admin‘,查询出的所有结果status字段都自加1 

 1 //deleteAll 2 Post::model()->deleteAll($condition,$params);  3 $count = Admin::model()->deleteAll(‘username=:name and password=:pass‘,array(‘:name‘=>‘admin‘,‘:pass‘=>‘admin‘));  4 $count = Admin::model()->deleteAll(‘id in("1,2,3")‘);//删除id为这些的数据  5 if($count>0){echo "删除成功"; }else{ echo "删除失败"; } 6   7 //deleteByPk 8 Post::model()->deleteByPk($pk,$condition,$params);  9 $count = Admin::model()->deleteByPk(1); 10 $count =Admin::model()->deleteByPk(array(1,2),‘username=:name‘,array(‘:name‘=>‘admin‘)); 11 if($count>0){ echo "删除成功"; }else{ echo "删除失败"; }