iHotel_student_houtai/src/main/resources/mapper/template/BlacklistOrderMapper.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.template.mapper.BlacklistOrderMapper">

    <select id="getBlacklist" resultType="com.template.model.vo.BlacklistVo">
        SELECT *
        FROM (SELECT reserve_user_id as id,
                     COUNT(reserve_user_id) AS count
              FROM
                  `blacklist`
              WHERE deleted=0
              GROUP BY
                  reserve_user_id) a
        WHERE a.count > #{count}
    </select>
</mapper>