<?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.iailab.module.model.mpk.dao.ChartParamDao"> <select id="selectChartParamByChartCode" resultType="com.iailab.module.model.mpk.entity.ChartParamEntity" parameterType="java.lang.String"> SELECT t2.* FROM t_chart t1 LEFT JOIN t_chart_param t2 ON t1.id = t2.chart_id WHERE t1.chart_code = #{chartCode} </select> </mapper>