<?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="pwc.taxtech.atms.dao.AreaMapper"> <select id="selectTopAreas" resultMap="BaseResultMap"> select distinct <include refid="Base_Column_List" /> from area where parent_id is null </select> </mapper>