mysql根据某一字段去除重复数据

SQL如下：

DELETE 
FROM
    aa 
WHERE
    shopid NOT IN (
SELECT
    temp.min_id 
FROM
    ( SELECT MIN(shopid) as min_id FROM aa GROUP BY shopurl) AS temp 
    )

说明：删除表中的shopurl字段重复的数据，保留一条

删除后的结果