<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.whyc.mapper.CkPowerDevParamLogMapper" >
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<select id="getOpNum" resultType="java.lang.String">
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select op_num from db_ckpwrdev_data_rt.tb_ckpowerdev_param_log
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order by id desc limit 1
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</select>
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</mapper>
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