当我在线程中运行它时,它工作得很好,但我想使用Asynctask,并且当我执行我的版本时,什么也没有发生: //set the download URL, a url that points to a file on the internet URL url = new URL(filename2);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConne
我需要它给我33 - 39周的总数为0,但我真的很难加入3张桌子,而且我也搞不清楚
SELECT SUM(tracker_parts_archive.weight), FROM RIGHT JOIN
(SELECT dt FROM calendar_table WHERE dt >= '2018-7-1' AND dt <=