MyBatis与mysql内接关联查询

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.ask.mapper.OrderCustomMapper"> 

 <resultMap type="com.ask.pojo.OrderCustom" id="orderCustom">

     <id column="id" property="id"/>

     <result column="user_id" property="user_id"/>

     <result column="number" property="number"/>

     <result column="createTime" property="createTime"/>

     <result column="note" property="note"/>

     <result column="username" property="name"/>

     <result column="address" property="address"/>

 </resultMap>

 <!-- 内接关联查询 -->

  <select id="getOrderAndUser" resultMap="orderCustom">

     SELECT 
 o.*,
 u.username,
 u.address 
FROM
 orders o,
 USER u 
WHERE o.user_id = u.id 

  </select>

</mapper>