數據庫A如下,我現在要對time列進行合計,select sum(time) as sumtime from A ,結果:31:10:30m,應該怎么寫語句?time??08:30:0009:30:0012:00:0001:10:30
time合計怎么寫
躍然一笑
2018-12-07 11:32:22