update

于紫祥_1901

2020-10-10 00e38ff225eb948f5234934afc01aa54c94e0de6

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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.moral.mapper.QualityDailyMapper"> 
<!--  
    <select id="getQualityCountDayByRegion" resultType="map"> 
        SELECT 
            COUNT( * ) count  
        FROM 
            quality_daily  
        <where> 
            time >= #{start}  
            AND time &lt; #{end}  
            AND city_code = #{cityCode}  
            AND quality &lt; 3         
        </where> 
    </select> 
 --> 
 
    <select id="getQualityCountDayByRegion" resultType="map"> 
        SELECT COUNT(*) count 
        FROM ( 
            SELECT 
                MAX(CASE aqi_json ->> '$.quality'  
                        WHEN "优" THEN 1  
                        WHEN "良" THEN 2  
                        WHEN "轻度污染" THEN 3  
                        WHEN "中度污染" THEN 4  
                        WHEN "重度污染" THEN 5  
                        WHEN "严重污染" THEN 6  
                        ELSE 0 END 
                )    AS quality 
            FROM 
                `hangzhou_aqi`  
            <where> 
                time >= #{start}  
                AND time &lt; #{end}  
                AND city_code = #{cityCode}  
            </where> 
            GROUP BY DATE_FORMAT( time, '%Y-%m-%d' ) 
        ) t 
        <where> 
            t.quality &lt; 3 
        </where> 
    </select> 
</mapper>