<?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.govmade.modules.system.dao.DictDao"> <select id="selectChilds" resultType="DictEntity"> select value,name from system_dicts where pid = (select id from system_dicts where value = #{pValue}) </select> </mapper>