计算臭氧平缓平均值

yuzixiang

2020-05-19 e25c689888a0dd80d07ffc4e4a45bd290b3d010c

 src/main/resources/mapper/HistoryMapper.xml

@@ -254,5 +254,15 @@
        ORDER BY

        h.time

    </select>

    <select id="getO3AVG" resultType="java.lang.String">

        select AVG(history_hourly.json->'$.e15[0]')

        FROM history_hourly

         where time <![CDATA[>=]]>#{frontTime}

         and time <![CDATA[<]]>#{afterTime}

         and mac=#{mac}

    </select>

    <select id="getNum" resultType="java.lang.Integer">

        select count(*) from history_hourly where time <![CDATA[>=]]> #{timef} and time <![CDATA[<=]]> #{timea}

    </select>



</mapper>