如何对列进行分层排序？

Question

我怎样才能按2个独立的列排序？例如，我想排序列6，再排序列4

column4 column5 column6 
lae2894  603 user1 
e2894  2096 user1 
e2894  2096 user1 
e2894  2096 user1 
lae2894  603 user1 
lae2894  603 user1 

那些已经通过以下命令进行排序：

sort -t, -k6 users.txt > sorted-user.txt 

但我想应该是这样的输出：

column4  column5  column6 
e2894   603  user1 
e2894   2096  user1 
e2894   2096  user1 
laee2894  2096  user1 
lae2894   603  user1 
lae2894   603  user1 

Answer 1

sort的大多数版本允许多个关键规范。试试这个：

我假设你的实际输入文件使用,作为分隔符，因为你指定在你的榜样命令（这意味着您贴上了“榜样”的数据是不是真的代表你的文件...）。还要注意，只有一个数字的密钥规范（如-k6）意味着一个在该字段中开始并延伸到行尾的密钥，因此为了指定单个字段进行排序，您需要使用上面的语法。

Answer 2

sort的-k选项可能会出现多次。请尝试：

sort -t, -k6,6 -k4,4 inputfile 

有关更多信息，请参阅sort invocation。

> ‘-k pos1[,pos2]’ 
> ‘--key=pos1[,pos2]’ 

Specify a sort field that consists of the part of the line between pos1 and pos2 (or the end of the line, if pos2 is omitted), inclusive. 
Each pos has the form ‘f[.c][opts]’, where f is the number of the field to use, and c is the number of the first character from the beginning of the field. Fields and character positions are numbered starting with 1; a character position of zero in pos2 indicates the field's last character. If ‘.c’ is omitted from pos1, it defaults to 1 (the beginning of the field); if omitted from pos2, it defaults to 0 (the end of the field). opts are ordering options, allowing individual keys to be sorted according to different rules; see below for details. Keys can span multiple fields. 

Example: To sort on the second field, use --key=2,2 (-k 2,2). See below for more notes on keys and more examples. See also the --debug option to help determine the part of the line being used in the sort.