<?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.newfiber.api.pc.dao.TempDataMapper"> <resultMap id="resultData" type="com.newfiber.api.pc.model.vo.TempDataVo"> <result column="site_no" property="siteNo"/> <result column="site_name" property="siteName"/> <result column="z" property="z"/> </resultMap> <select id="selectSiteNameAndZData" resultMap="resultData"> select psi.site_no,site_name,td.Z from pro_site_info psi left JOIN TempData td ON psi.site_no = td.ST </select> </mapper>