My understanding was that by using -nrk2,1 the fields would be sorted (reverse) numerically by field 2, then by field 1 (presumably alphabetically - which was wrong).
If you try
Then that's OK (numerically), but the rest (-nrk2,1) doesn't sort the first field after that as I thought.
Sort is a powerful command if you can master it - something I have neither the time nor inclination to do!
Given that the records are sorted reverse numerically in field 2 with "sort -nrk2"...
the awk says:
if I don't have a color (where $1 = purple, or whatever) in my array (C[purple]), then define something (anything) for purple (C[$1]=1) so that I do, and then print the line. If I do have something already defined, then do nothing (thus printing only the first line with each (sorted) color).
Last edited by Scott; 10-20-2009 at 03:40 PM..
Reason: added the word "reverse" in a couple of places, for clarity
Hi ;
I have a question regarding the uniq command in unix
How do I uniq 3rd field in a file ?
original file :
zoom coord 39 18652 39 18652
zoom coord 39 18653 39 18653
zoom coord 39 18818 39 18818
zoom coord 39 18840 39 18840
zoom coord 41 15096 41 15096
zoom... (1 Reply)
i have a file a.txt and following is only one portion.
I want to search <branch value="/dev36/AREA/" include="yes"></branch> present in between
<template_file name="Approve External" path="core/approve/bin" and </template_file>
where the no of lines containing "<branch value= " is increasing ... (2 Replies)
So, I have a file that has some duplicate lines. The file has a header line that I would like to keep at the top.
I could do this by extracting the header from the file, 'sort -u' the remaining lines, and recombine them. But they are quite big, so if there is a way to do it with a single... (1 Reply)
Hi all,
Sorry for the title, I was unsure how to word my issue. I'll get right to the issue. In my text file, I need to find all lines with the same data in the first field. Then I need to create a file with the matching lines merged into one. So my original file will look something like... (4 Replies)
My sql file xyz_abc.sql in this file there are multiple sql block in this block I need to find the following block
rem Subset Rows (&&tempName.*)
CREATE VIEW &&tempName.* AS
SELECT *
FROM &&tempName.*
WHERE f is not null
and replace with following code
rem Subset Rows... (9 Replies)
Hi,
I would like to know how to solve one of my problems using expert unix commands.
I have a file with occasional blank lines;
for example;
dertu
frthu
fghtu
frtty
frtgy
frgtui
frgtu
ghrye
frhutp
frjuf
I need to edit the file so that the file looks like this; (10 Replies)
Hi All,
I am searching for a script which will produce an output file with the uniq first field with the second field having highest value among all the duplicates..
The output file will produce only the uniqs which are duplicate 3 times..
Input file
X 9
B 5
A 1
Z 9
T 4
C 9
A 4... (13 Replies)
Platform :Oracle Linux 6.4
Shell : bash
The below file has 7 lines , some of them are duplicates. There are only 3 distinct lines. But why is the uniq command still showing 7 ?
I just want the distinct lines to be returned.
$ cat test.txt
SELECT FC.COORD_SET_ID FROM OM_ORDER_FLOW F, -... (2 Replies)
Hi ,
i have a file with data as below.This is same file. But actual file contains to many rows.
i want to search for a string "Field 039 00" and delete that line and previous 3 lines in that file.. Can some body suggested me how can i do using either sed or awk command ?
Field 004... (7 Replies)
I have a file where every line includes four expressions with a caret in the middle (plus some other "words" or fields, always separated by spaces). I would like to extract from this file, all those lines such that each of the four expressions containing a caret appears in at least four different... (9 Replies)
Discussion started by: uncleMonty
9 Replies
LEARN ABOUT PLAN9
join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If one of the file names is the
standard input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Input fields are normally separated spaces or tabs; output fields by space. In this case, multiple separators count as one, and leading
separators are discarded.
The following options are recognized, with POSIX syntax.
-a n In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-v n Like -a, omitting output for paired lines.
-e s Replace empty output fields by string s.
-1 m
-2 m Join on the mth field of file1 or file2.
-jn m Archaic equivalent for -n m.
-ofields
Each output line comprises the designated fields. The comma-separated field designators are either 0, meaning the join field, or
have the form n.m, where n is a file number and m is a field number. Archaic usage allows separate arguments for field designators.
-tc Use character c as the only separator (tab character) on input and output. Every appearance of c in a line is significant.
EXAMPLES
sort /adm/users | join -t: -a 1 -e "" - bdays
Add birthdays to password information, leaving unknown birthdays empty. The layout of is given in users(6); bdays contains sorted
lines like
tr : ' ' </adm/users | sort -k 3 3 >temp
join -1 3 -2 3 -o 1.1,2.1 temp temp | awk '$1 < $2'
Print all pairs of users with identical userids.
SOURCE
/sys/src/cmd/join.c
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b -ky,y; with -t, the sequence is that of sort -tx -ky,y.
One of the files must be randomly accessible.
JOIN(1)