huimv-deqing-huyang/huimv-huyang-admin/target/classes/mapper/ScreenEnvMapper.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.huimv.admin.screen.mapper.ScreenEnvMapper">

    <select id="listScreen" resultType="com.huimv.admin.screen.entity.vo.ScreenEnvVo">
        select Convert((IFNUll(avg(hum),'0')),DECIMAL(10,2)) 'hum',Convert((IFNUll(avg(temp),'0')),DECIMAL(10,2)) 'temp',create_time 'createTime'
        from screen_env
        ${ew.customSqlSegment}
        group by DATE_FORMAT(create_time,'%y-%m-%d %H')
        order by create_time asc
    </select>
</mapper>