我试图将具有不同行但共有一个元素的两个文件合并在一起。
FILE1：
1/temperature
2/rainfall
3/snowfall
4/windspeed
5/winddirection
FILE2：
2008-10-01/1/68
2008-10-02/2/6
2008-10-03/3/4
2008-10-04/4/25
2008-10-05/5/120
2008-10-01/1/89
2008-10-01/4/35
2008-11-01/5/360
2008-10-01/1/45
2008-12-01/1/61
2008-10-10/1/32
我正在尝试使用以下命令将两个文件都加入
join -t/ -1 1 -2 2 FILE1 FILE2
我期望以下输出：
1/temperature/2008-10-01/68
1/temperature/2008-10-01/89
1/temperature/2008-10-01/45
1/temperature/2008-12-01/61
1/temperature/2008-10-10/32
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
4/windspeed/2008-10-01/35
5/winddirection/2008-10-05/120
5/winddirection/2008-11-01/360
但是我以这种方式有前5行：
1/temperature/2008-10-01/68
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
5/winddirection/2008-10-05/120
请您的帮助我做错了什么
join期望对其输入进行排序（在要连接的字段上）。在这种情况下（利用bash shell的进程替换）：
$ join -t/ -1 1 -2 2 FILE1 <(sort -t/ -k2 FILE2)
1/temperature/2008-10-10/32
1/temperature/2008-10-01/45
1/temperature/2008-12-01/61
1/temperature/2008-10-01/68
1/temperature/2008-10-01/89
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
4/windspeed/2008-10-01/35
5/winddirection/2008-10-05/120
5/winddirection/2008-11-01/360
请注意，所需的排序是词法而不是数字-如果第一列中的值FILE1超过9，那么您可能还需要对其进行预排序。
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