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

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.bizmatics.model.DeviceAttribute">
        <id column="id" property="id" />
        <result column="monitor_device_name" property="monitorDeviceName" />
        <result column="loop_meter_address" property="loopMeterAddress" />
        <result column="rated_voltage" property="ratedVoltage" />
        <result column="rated_current" property="ratedCurrent" />
        <result column="current_load_rate" property="currentLoadRate" />
        <result column="monitor_device_code" property="monitorDeviceCode" />
        <result column="variable_list_id" property="variableListId" />
        <result column="creator" property="creator" />
        <result column="create_time" property="createTime" />
        <result column="quality_analysis" property="qualityAnalysis" />
        <result column="status" property="status" />
    </resultMap>

    <select id="monitorDeviceList" resultType="com.bizmatics.model.vo.MonitorDeviceListVO">
        SELECT
        a.id,
        a.site_name,
        a.site_address,
        a.user_name,
        a.phone,
        IF (
        b.device_count &lt;&gt; '',
        b.device_count,
        0
        ) AS device_count
        FROM
        site AS a
        LEFT JOIN (
        SELECT
        site_id,
        COUNT(*) AS device_count
        FROM
        device_attribute
        <where>
            status=1
        </where>
        GROUP BY
        site_id
        ) AS b ON a.id = b.site_id
        <where>
            a.enable =1
            <if test="siteName != null and siteName !=''">
                and a.site_name LIKE CONCAT(CONCAT('%', #{siteName}), '%')
            </if>
        </where>
        <if test="startCurrent != null and size !=0">
            LIMIT #{startCurrent},
            #{size}
        </if>
    </select>
</mapper>