usky-power/fiveep-persistence/src/main/resources/mapper/mysql/HadSiteStaticMapper.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.bizmatics.persistence.mapper.HadSiteStaticMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.bizmatics.model.HadSiteStatic">
        <id column="id" property="id" />
        <result column="site_id" property="siteId" />
        <result column="max_epp" property="maxEpp" />
        <result column="min_epp" property="minEpp" />
        <result column="avg_epp" property="avgEpp" />
        <result column="load_ico" property="loadIco" />
        <result column="his_ico" property="hisIco" />
        <result column="had_time" property="hadTime" />
    </resultMap>
    <select id="selectCount" resultType="java.lang.Double">
        select
        IFNULL(sum(siteSum),0)
        FROM (
            SELECT
            (max(max_epp)-min(min_epp)) as siteSum
            FROM
            had_site_static as hs
            INNER JOIN user_site as us
            on hs.site_id = us.site_id
            <where>
                <if test="userId != null and userId != 0">
                    and us.user_id = #{userId}
                </if>
                <if test="siteId != null and siteId != 0">
                    and us.site_id = #{siteId}
                </if>
                <if test="startTime != null and endTime != null">
                    and hs.had_time between #{startTime} and #{endTime}
                </if>
        </where>
            GROUP BY hs.site_id

        )as t
    </select>

</mapper>