SQL编写——查询最近的年份的人均收入与去年的人均收入百分比

<?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="AgriculturalDataOverviewMapper"> <

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