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Full Discussion: Comparing two files and writing mismatched rows along with mismatched columns. Pointing out the mism
Top Forums UNIX for Advanced & Expert Users Comparing two files and writing mismatched rows along with mismatched columns. Pointing out the mism Post 302997144 by drl on Monday 8th of May 2017 01:29:03 PM
Old 05-08-2017
HI.

Using your sample data, here is a solution using a GNU utility, dwdiff. Basically, it operates on space-separated words, so I modified your sample files to be that instead of | separated:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate field/word diff, dwdiff.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
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 dwdiff

FILE=${1-data1}

pl " Input data files:"
head data?

pl " Amended data files::"
sed 's/|/ /g' data1 > t1
sed 's/|/ /g' data2 > t2
head t?

pl " Results:"
dwdiff t1 t2

pl " More details for dwdiff:"
dixf dwdiff

exit 0

producing:
Code:
$ ./s1

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
dwdiff 2.0.9

-----
 Input data files:
==> data1 <==
1|piyush|bangalore|dev 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|delhi|QA

==> data2 <==
1|piyush|bangalore|QA 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|bangalore|dev

-----
 Amended data files::
==> t1 <==
1 piyush bangalore dev 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit delhi QA

==> t2 <==
1 piyush bangalore QA 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit bangalore dev

-----
 Results:
1 piyush bangalore [-dev-] {+QA+} 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit [-delhi QA-] {+bangalore dev+}

-----
 More details for dwdiff:
dwdiff  a delimited word diff program (man)
Path    : /usr/bin/dwdiff
Version : 2.0.9
Type    : ELF 64-bit LSB executable, x86-64, version 1 (SYSV ...)
Help    : probably available with --help
Repo    : Debian 8.7 (jessie)

Note that the braces enclose the markers + for an addition, - for a deletion.

There are a number of additional options. See man dwdiff for details.

Best wishes ... cheers, drl
 

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LEARN ABOUT OPENSOLARIS

env

env(1)								   User Commands							    env(1)

NAME

       env - set environment for command invocation

SYNOPSIS

       /usr/bin/env [-i | -] [name=value]... [utility [arg... ]]

       /usr/xpg4/bin/env [-i | -] [name=value]...
	    [utility [arg... ]]

DESCRIPTION

       The  env utility obtains the current environment, modifies it according to its arguments, then invokes the utility named by the utility op-
       erand with the modified environment.

       Optional arguments are passed to utility. If no utility operand is specified, the resulting environment is written to the standard  output,
       with one name=value pair per line.

   /usr/bin
       If env executes commands with arguments, it uses the default shell /usr/bin/sh (see sh(1)).

   /usr/xpg4/bin
       If env executes commands with arguments, it uses /usr/xpg4/bin/sh (see ksh(1)).

OPTIONS

       The following options are supported:

       -i | -	     Ignores  the  environment that would otherwise be inherited from the current shell.  Restricts the environment for utility to
		     that specified by the arguments.

OPERANDS

       The following operands are supported:

       name=value     Arguments of the form name=value modify the execution environment, and are placed  into  the  inherited  environment  before
		      utility is invoked.

       utility	      The  name of the utility to be invoked.  If utility names any of the special shell built-in utilities, the results are unde-
		      fined.

       arg	      A string to pass as an argument for the invoked utility.

EXAMPLES

       Example 1 Invoking utilities with new PATH values

       The following utility:

	 example% env -i PATH=/mybin mygrep xyz myfile

       invokes the utility mygrep with a new PATH value as the only entry in its environment. In this case, PATH is used to locate  mygrep,  which
       then must reside in /mybin.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions of the following environment variables that affect the execution of env: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

       PATH    Determine the location of the utility. If PATH is specified as a name=value operand to env, the value given shall be  used  in  the
	       search for utility.

EXIT STATUS

       If  utility  is invoked, the exit status of env is the exit status of utility. Otherwise, the env utility returns one of the following exit
       values:

       0	 Successful completion.

       1-125	 An error occurred.

       126	 utility was found but could not be invoked.

       127	 utility could not be found.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

   /usr/bin
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+

   /usr/xpg4/bin
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWxcu4			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), exec(2), profile(4), attributes(5), environ(5), standards(5)

SunOS 5.11							    2 Jan 2002								    env(1)
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