CIS/src/main/resources/mapper/BenchDevInfoMapper.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.welampiot.dao.BenchDevInfoDao">

    <delete id="deleteBenchById">
        delete
        from bench_dev_info
        where id = #{id};
    </delete>

    <select id="getLampPoleIdByBenchId" resultType="Integer">
        select b.lamp_pole_id
        from bench_dev_info b
        where b.id = #{id}
    </select>

    <select id="getBenchCountByLampPoleId" resultType="Integer">
        select count(*)
        from bench_dev_info b
        where b.lamp_pole_id = #{lampPoleId}
    </select>

</mapper>