MyBatis table association

查询主表：<resultMaptype="com.demo.bean.WXGameRankingBean" id="weiboJoinAccountResultMap">        <id property="id" column="id" />        <result property="score" column="score" />        <result property="openid" column="openid" />        <result property="createTime" column="create_time" />        <result property="gameid" column="gameid" />        <result property="subscribe" column="subscribe" />        <association property="device" column="dp_id" javaType="com.demo.bean.DeviceBean" resultMap="joinAccountResult" />    <id property="dpId" column="dp_id" />type="com.demo.bean.DeviceBean" id="joinAccountResult"><resultMapTo associate table data:</resultMap>













    <id property="openId" column="openid" /></resultMap>

 

<!--?xml version="1.0" encoding="UTF-8" standalone="no"?--> 查询语句：<selectid="getDeviceAndRankingByGameid" resultMap="weiboJoinAccountResultMap" parameterType="java.util.HashMap">     select rr.id as id,rr.score as score,rr.openid as openid,rr.create_time as createTime,     rr.gameid as gameid,rr.subscribe as subscribe,dd.* from wx_game_ranking rr left outer join zqw_device dd on rr.openid = dd.openid      where rr.openid = dd.openid and rr.gameid=#{gameid} and rr.subscribe=#{subscribe} group by rr.openid order by rr.score desc,rr.create_time asc     <if test="limit != null">         ${limit}    </if></select>