cooleshow/cooleshow-user/user-biz/src/main/resources/config/mybatis/StudentStarMapper.xml

<?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.yonge.cooleshow.biz.dal.dao.StudentStarDao">
	<resultMap id="BaseResultMap" type="com.yonge.cooleshow.biz.dal.entity.StudentStar">
            <result column="teacher_id_" property="teacherId" />
	        <result column="student_id_" property="studentId" />
	        <result column="create_time_" property="createTime" />
		</resultMap>  
    
    <!-- 表字段 -->
    <sql id="baseColumns">
         t.teacher_id_ as "teacherId"
        , t.student_id_ as "studentId"
        , t.create_time_ as "createTime"
        </sql>

	<select id="queryTeacherHomeTotal" resultType="com.yonge.cooleshow.biz.dal.vo.TeacherTotalVo">
		select
			teacher_id_ as userId,
			count(1) as fansNum
		from student_star
		group by teacher_id_
	</select>

</mapper>