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Sorting a column of CSV file resulting in 1123 appearing before 232

Specific question - bad title I am trying to sort a set of CSV data like -

2014/06/04 13:19:06.970,1124,Post Request,200,OK,text,true,,782,1,0
2014/06/04 13:18:27.241,237,Post Request,200,OK,text,true,,303,1,0
2014/06/04 13:12:15.973,2224,Post Request,200,OK,text,true,,1551,1,0
2014/06/04 13:12:31.365,238,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:12:29.892,1429,Post Request,204,No Content,,true,,237,1,0

using - 

sort -t"," -k2,3

The result is 

2014/06/04 13:19:06.970,1124,Post Request,200,OK,text,true,,782,1,0
2014/06/04 13:18:27.241,1429,Post Request,200,OK,text,true,,303,1,0
2014/06/04 13:12:15.973,2224,Post Request,200,OK,text,true,,1551,1,0
2014/06/04 13:12:31.365,237,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:12:29.892,238,Post Request,204,No Content,,true,,237,1,0

But I want something like -

2014/06/04 13:19:06.970,237,Post Request,200,OK,text,true,,782,1,0
2014/06/04 13:18:27.241,238,Post Request,200,OK,text,true,,303,1,0
2014/06/04 13:12:15.973,1124,Post Request,200,OK,text,true,,1551,1,0
2014/06/04 13:12:31.365,1429,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:12:29.892,2224,Post Request,204,No Content,,true,,237,1,0

or reverse of this (actually reverse is better for me). What am I doing wrong?

Solution

  • Add -n to have it sorted numerically:

    $ sort -n -t"," -k2,3 file
2014/06/04 13:18:27.241,237,Post Request,200,OK,text,true,,303,1,0
2014/06/04 13:12:31.365,238,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:19:06.970,1124,Post Request,200,OK,text,true,,782,1,0
2014/06/04 13:12:29.892,1429,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:12:15.973,2224,Post Request,200,OK,text,true,,1551,1,0

    Or reverse with -r:

    $ sort -rn -t"," -k2,3 file
2014/06/04 13:12:15.973,2224,Post Request,200,OK,text,true,,1551,1,0
2014/06/04 13:12:29.892,1429,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:19:06.970,1124,Post Request,200,OK,text,true,,782,1,0
2014/06/04 13:12:31.365,238,Post Request,204,No Content,,true,,237,1,0
2014/06/04 13:18:27.241,237,Post Request,200,OK,text,true,,303,1,0

    From man sort:

    -n, --numeric-sort

    compare according to string numerical value

    -r, --reverse

    reverse the result of comparisons