因项目需求，需要将查询结果，去重后，在按照主键(自增列)排序，百度一番，记录下来
DEMO
1 SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY STATION_NAME ORDER BY ID DESC) RNO,STATION_NAME,ID FROM EMES_MAC) WHERE RNO=1 ORDER BY ID DESC 2 3 4 格式:SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY 去重字段 ORDER BY 排序字段 DESC) RNO,去重字段,排序字段 FROM 表名) WHERE RNO=1 ORDER BY 排序字段 DESC