yii DAO操作总结

1. 数据库代码：

   /*

   Navicat MySQL Data Transfer

   Source Server         : lonxom

   Source Server Version : 50524

   Source Host           : localhost:3306

   Source Database       : test

   Target Server Type    : MYSQL

   Target Server Version : 50524

   File Encoding         : 65001

   Date: 2013-10-12 00:03:03

   */

   SET FOREIGN_KEY_CHECKS=0;

   -- ----------------------------

   -- Table structure for `city`

   -- ----------------------------

   DROP TABLE IF EXISTS `city`;

   CREATE TABLE `city` (

   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,

   `name` varchar(32) COLLATE utf8_unicode_ci NOT NULL DEFAULT '' COMMENT '城市名',

   PRIMARY KEY (`id`)

   ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='城市表';

   -- ----------------------------

   -- Records of city

   -- ----------------------------

   INSERT INTO `city` VALUES ('1', '北京');

   INSERT INTO `city` VALUES ('2', '上海');

   INSERT INTO `city` VALUES ('3', '广州');

   INSERT INTO `city` VALUES ('4', '武汉');

   INSERT INTO `city` VALUES ('5', '天津');

   -- ----------------------------

   -- Table structure for `user`

   -- ----------------------------

   DROP TABLE IF EXISTS `user`;

   CREATE TABLE `user` (

   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,

   `username` varchar(32) CHARACTER SET utf8 NOT NULL COMMENT '用户名',

   `city_id` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '城市',

   `create_time` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '创建时间',

   `update_time` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '更新时间',

   PRIMARY KEY (`id`)

   ) ENGINE=InnoDB AUTO_INCREMENT=23 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='用户表';

   -- ----------------------------

   -- Records of user

   -- ----------------------------

   INSERT INTO `user` VALUES ('2', '菩提', '2', '0', '0');

   INSERT INTO `user` VALUES ('3', '天师', '5', '0', '0');

   INSERT INTO `user` VALUES ('5', '久1', '3', '0', '0');

   INSERT INTO `user` VALUES ('6', '久2', '4', '0', '0');

   INSERT INTO `user` VALUES ('7', '久3', '1', '0', '0');

   INSERT INTO `user` VALUES ('8', '久4', '4', '0', '0');

   INSERT INTO `user` VALUES ('9', '久5', '5', '0', '0');

   INSERT INTO `user` VALUES ('10', '久6', '1', '0', '0');

   INSERT INTO `user` VALUES ('11', '久7', '3', '0', '0');

   INSERT INTO `user` VALUES ('12', '久8', '3', '0', '0');

   INSERT INTO `user` VALUES ('13', '久9', '1', '0', '0');

   INSERT INTO `user` VALUES ('14', '帅帅', '1', '1381395175', '1381395175');

   INSERT INTO `user` VALUES ('15', '小猪猪', '1', '1381396237', '1381463258');

   INSERT INTO `user` VALUES ('16', '阿浩', '2', '1381396559', '1381396559');

   INSERT INTO `user` VALUES ('17', '鹏鹏', '1', '1381398344', '1381398344');

   INSERT INTO `user` VALUES ('18', '方方', '5', '1381398969', '1381398969');

   INSERT INTO `user` VALUES ('19', '官人', '1', '1381456860', '1381456860');

   INSERT INTO `user` VALUES ('20', '谢平', '4', '1381461563', '1381461563');

   INSERT INTO `user` VALUES ('21', '元方', '2', '1381463288', '1381463288');

   INSERT INTO `user` VALUES ('22', '康师傅', '1', '1381500128', '1381500128');

   -- ----------------------------

   -- Table structure for `user_info`

   -- ----------------------------

   DROP TABLE IF EXISTS `user_info`;

   CREATE TABLE `user_info` (

   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,

   `user_id` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '用户表id',

   `info` text CHARACTER SET utf8 COMMENT '用户简介',

   PRIMARY KEY (`id`)

   ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='用户信息表';

   -- ----------------------------

   -- Records of user_info

   -- ----------------------------

   INSERT INTO `user_info` VALUES ('1', '15', '我是一个好人');

   END

基本查询方法

1. 1

   //DAO方式的  插入动作

   public function actionCreate()

   {

   $res=Yii::app()->db->createCommand()->insert("user",array(

   'username'=>'水墨淡清',

   ));

   dump($res,FALSE);

   dump(Yii::app()->db->getLastInsertID());//获取最新插入的ID

   }

2. 2

   //DAO方式的  修改动作

   public function actionUpdate()

   {

   $res=Yii::app()->db->createCommand()->update('user',array(

   'username'=>'我是来玩的'

   ), 'id=:id',array(':id'=>24));

   dump($res);

   }

3. 3

    //DAO方式的  删除动作

   public function actionDelete($id)

   {

   $id=trim($id);

   $res=Yii::app()->db->createCommand()->delete('user','id=:id',array(':id'=>$id));

   dump($res);

   }

4. 4

   //单条数据查询 queryRow()

   public function actionRow()

   {

   $row=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where('id=:id',array(':id'=>2))->queryRow();

   dump($row);

   }

5. 5

   //多条数据查询 queryAll()

   public function actionAll()

   {

   $all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where('id>:id',array(':id'=>1))->queryAll();

   dump($all);

   }

6. 6

   //统计数据数量 queryScalar()

   public function actionScalar()

   {

   $scalar=Yii::app()->db->createCommand()->select('count(1)')->from('user')->where('id>:id',array(':id'=>1))->queryScalar();

   dump($scalar);

   }

7. 7

   //查询所有的ID

   public function actionColumn()

   {

   $ids=Yii::app()->db->createCommand()->select('id')->from('user')->where('id>:id',array(':id'=>1))->queryColumn();

   dump($ids);

   }

   END

基本查询条件方法

1.  

    //查询出ID大于1 并且小于5的所有数据集合 

   //and()方法

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where('id>:id and id<5',array(':id'=>1))->queryAll();

   //and()数组方法

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where(array('and','id>1','id<5'))->queryAll();

   //andWhere()方法

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where('id>:id',array(':id'=>1))->andWhere('id<:eid',array(':eid'=>5))->queryAll();

2.  

    //使用in查询出id在5和6里面的数据集合

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where(array('in','id',array(5,6)))->queryAll();

3.  

    //使用like查询 并且 ID大于6小于10

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where(array('like','username','%久%'))->andWhere(array('and','id>6','id<10'))->queryAll();

4.  

   //查询出名字里面带有9的 3条数据 ID倒序 略过3条数据

   //$all=Yii::app()->db->createCommand()->select('id,username,city_id')->from('user')->where(array('like','username','%久%'))->limit(3)->offset(3)->order('id desc')->queryAll();

   dump($all);

5. 5

    //关联查询 

   public function actionJoin()

   {

   //取出id 大于 2 小于 6的所有用户信息并取出城市名称

   $users=Yii::app()->db->createCommand()->select('u.id,u.username,c.name')

   ->from('user u')

   ->join('city c','c.id=u.city_id')

   ->where('u.id>2')

   ->andWhere('u.id<6')

   ->queryAll();

   dump($users);

   }