这个问题在这里已有答案:
我正在预处理apache服务器日志数据。我有3列ID,TIME和BYTES。例:
ID&nbsp&nbsp TIME&nbsp&nbsp BYTES
1&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
2&nbsp&nbsp&nbsp 13:02&nbsp&nbsp 30
3&nbsp&nbsp&nbsp 13:03&nbsp&nbsp 40
4&nbsp&nbsp&nbsp 13:02&nbsp&nbsp 50
5&nbsp&nbsp&nbsp 13:03&nbsp&nbsp 70
我希望实现这样的目标:
ID&nbsp&nbsp TIME&nbsp&nbsp BYTES
1&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
2&nbsp&nbsp&nbsp 13:02&nbsp&nbsp 80
3&nbsp&nbsp&nbsp 13:03&nbsp&nbsp 110