我尝试使用SDK版本3将图像上传到S3存储桶，但我收到以下错误:Errorexecuting"PutObject"on"https://s3.Ireland.amazonaws.com/my-bucket-name/testFile.jpg";AWSHTTPerror:cURLerror6:Couldn'tresolvehost's3.Ireland.amazonaws.com'(seehttp://curl.haxx.se/libcurl/c/libcurl-errors.html)这是我第一次尝试这样做，所以我没有太大的信心。通过AWS接口(interface)上传文件，其URL类

有没有一种简单的方法可以将GROUPBY结果限制在前2位。以下查询返回所有结果。使用“LIMIT2”将整个列表减少到仅前2个条目。selectdistinct(rating_name),id_markets,sum(rating_good)'good',sum(rating_neutral)'neutral',sum(rating_bad)'bad'fromratingswhererating_year=year(curdate())andrating_week=week(curdate(),1)groupbyrating_name,id_marketsorderbyrating_na

有没有一种简单的方法可以将GROUPBY结果限制在前2位。以下查询返回所有结果。使用“LIMIT2”将整个列表减少到仅前2个条目。selectdistinct(rating_name),id_markets,sum(rating_good)'good',sum(rating_neutral)'neutral',sum(rating_bad)'bad'fromratingswhererating_year=year(curdate())andrating_week=week(curdate(),1)groupbyrating_name,id_marketsorderbyrating_na