Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Compare the second column of a file with the second column of another in awk
Top Forums Shell Programming and Scripting Compare the second column of a file with the second column of another in awk Post 302811373 by Yoda on Thursday 23rd of May 2013 01:11:14 PM
Old 05-23-2013
The code that you posted was actually comparing 2nd field in file2 with 2nd field in file1:
Code:
awk 'NR==FNR{a[$2]=$0;next}a[$2]{$0=a[$2]}1'  file2 file1

But your requirement was to compare it other way! I believe this must have caused the discrepancy in the output because you said file1 contains 67 records.

Also your code was logically wrong because you put a 1 to print each record regardless the record is found or not:
Code:
awk 'NR==FNR{a[$2]=$0;next}a[$2]{$0=a[$2]}1'  file2 file1

I hope this helps.
This User Gave Thanks to Yoda For This Post:
amarn
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to compare the values of a column in awk in a same file and consecutive lines..

I would like to compare the values of 2nd column of consecutive lines of same file in such a way so that if the difference between first value and second value is more than 100 it should print complete line else ignore line. Input File ========== PDB 2500 RTDB 123 RTDB-EAGLE 122 VSCCP 2565... (4 Replies)
Discussion started by: manuswami
4 Replies

2. Shell Programming and Scripting

awk compare column n replace with in one file

hi Friends need to compare columns in one file where the data looks like below laptop,IBM phone,samsung car,rental user1,laptop user2,laptop user3,phone want to get output as laptop,IBM phone,samsung car,rental user1,IBM user2,IBM user3,samsung need to seach $2 in array of $1 and... (4 Replies)
Discussion started by: arun1401
4 Replies

3. Shell Programming and Scripting

How to awk or grep the last column in file when date on column contains spaces?

Hi have a large spreadsheet which has 4 columns APM00111803814 server_2 96085 Corp IT Desktop and Apps APM00111803814 server_2 96085 Corp IT Desktop and Apps APM00111803814 server_2 96034 Storage Mgmt Team APM00111803814 server_2 96152 GWP... (6 Replies)
Discussion started by: kieranfoley
6 Replies

4. Shell Programming and Scripting

How to compare the values of a column in a same file using awk?

Dear Unix experts, I have got a file where I would like to compare the values of second column if first column is same in such a way that the difference between the values is >50. If not, I would like to discard both values. For example, my input file looks like - comp275_c0_seq2 73... (7 Replies)
Discussion started by: utritala
7 Replies

5. Shell Programming and Scripting

Solution for replacement of 4th column with 3rd column in a file using awk/sed preserving delimters

input "A","B","C,D","E","F" "S","T","U,V","W","X" "AA","BB","CC,DD","EEEE","FFF" required output: "A","B","C,D","C,D","F" "S", T","U,V","U,V","X" "AA","BB","CC,DD","CC,DD","FFF" tried using awk but double quotes not preserving for every field. any help to solve this is much... (5 Replies)
Discussion started by: khblts
5 Replies

6. Shell Programming and Scripting

Matching column value from 2 different file using awk and append value from different column

Hi, I have 2 csv files. a.csv HUAWEI,20LMG011_DEKET_1296_RTN-980_IDU-1-11-ISV3-1(to LAMONGAN_M),East_Java,20LMG011_DEKET_1296_RTN-980_IDU-1,20LMG011,20LMG 027_1287_LAMONGAN_RTN980_IDU1,20LMG027,1+1(HSB),195.675,20LMG011-20LMG027,99.9995,202.6952012... (7 Replies)
Discussion started by: tententen
7 Replies

7. Shell Programming and Scripting

Need awk or Shell script to compare Column-1 of two different CSV files and print if column-1 matche

Example: I have files in below format file 1: zxc,133,joe@example.com cst,222,xyz@example1.com File 2 Contains: hxd hcd jws zxc cst File 1 has 50000 lines and file 2 has around 30000 lines : Expected Output has to be : hxd hcd jws (5 Replies)
Discussion started by: TestPractice
5 Replies

8. UNIX for Beginners Questions & Answers

Compare 1st column from 2 file and if match print line from 1st file and append column 7 from 2nd

hi I have 2 file with more than 10 columns for both 1st file apple,0,0,0...... orange,1,2,3..... mango,2,4,5..... 2nd file apple,2,3,4,5,6,7... orange,2,3,4,5,6,8... watermerlon,2,3,4,5,6,abc... mango,5,6,7,4,6,def.... (1 Reply)
Discussion started by: tententen
1 Replies

9. UNIX for Beginners Questions & Answers

UNIX script to compare 3rd column value with first column and display

Hello Team, My source data (INput) is like below EPIC1 router EPIC2 Targetdefinition Exp1 Expres rtr1 Router SQL SrcQual Exp1 Expres rtr1 Router EPIC1 Targetdefinition My output like SQL SrcQual Exp1 Expres Exp1 Expres rtr1 Router rtr1 Router EPIC1 Targetdefinition... (5 Replies)
Discussion started by: sekhar.lsb
5 Replies

LEARN ABOUT SUSE

lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
All times are GMT -4. The time now is 10:13 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy