Compare & print content of file which is not matching

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# 1  
Compare & print content of file which is not matching

Hi All
I want to compare 2 files using awk and get output of content which is not matching

I have 2 files


Not matching line from b.txt

# 2  
Hello aaysa123,

Could you please try following and let me know if this helps you.
awk 'FNR==NR{A[$1];next} !($4 in A)' a.txt FS="|" b.txt

R. Singh
# 3  
Thanks it worked fine
# 4  

Here is an alternative to coding in awk. The crush toolset contains a number of programs to deal with CSV (DSV) files. One such is grepfield.

In this particular case, we need to collect the lines which contain the strings to search for. That's done with paste. After that, it's a simple command line:
#!/usr/bin/env bash

# @(#) s2       Demonstrate filtering for specific field, crush:grepfield.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C paste grepfield dixf

rm -f f1

pl " Input data file data[12]:"
head data[12]

pl " File data2 pasted together into variable v1:"
v1="$(paste -d'|' -s data2)"
pe " v1 = $v1"

pl " Expected output:"
cat $E

pl " Results, grep field 4, pipe delimiter:"
# Gathering lines -- from an idea at:
grepfield -d '|' -v -f 4 "$v1" data1 |
tee f1

pl " Verify results if possible:"
[ -f $C ] && $C || ( pe; pe " Results cannot be verified." ) >&2

pl " Details on grepfield (one tool in crush suite):"
dixf grepfield

exit 0

$ ./s2

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.7 (jessie) 
bash GNU bash 4.3.30
paste (GNU coreutils) 8.23
grepfield - ( local: /usr/local/bin/grepfield, 2017-05-17 )
dixf (local) 1.49

 Input data file data[12]:
==> data1 <==

==> data2 <==

 File data2 pasted together into variable v1:
 v1 = 123|456|780|143

 Expected output:

 Results, grep field 4, pipe delimiter:

 Verify results if possible:

 Comparison of 2 created lines with 2 lines of desired results:
 Succeeded -- files (computed) f1 and (standard) expected-output.txt have same content.

 Details on grepfield (one tool in crush suite):
grepfield       looks for patterns within a specific field of a flat-file (man)
Path    : /usr/local/bin/grepfield
Version : - ( local: /usr/local/bin/grepfield, 2017-05-17 )
Type    : ELF 64-bit LSB executable, x86-64, version 1 (SYSV ...)
Help    : probably available with -h,--help
Home    : (doc)

Best wishes ... cheers, drl
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