maven
2025-08-12 acd5c596b40b44e3ac3624a9cde7f62a1be6a076
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<?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.ruoyi.waterrecord.mapper.WaterRecordMapper">
 
    <select id="listPage" resultType="com.ruoyi.waterrecord.pojo.WaterRecord">
        select
               t1.*,
               t2.device_name
               from water_record t1
        left join device_ledger t2 on t1.device_model = t2.device_model
        <where>
            <if test="req.deviceName != null and req.deviceName != ''">
                and t2.device_name like concat('%',#{req.deviceName},'%')
            </if>
        </where>
    </select>
</mapper>