<?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.casic.missiles.mapper.meter.MeterCheckInfoMapper">

    <select id="selectMaxNo" resultType="java.lang.Long">
        SELECT IFNULL(max(RIGHT(check_no, 12)), 0) from meter_check_info
    </select>

</mapper>