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Top Forums Shell Programming and Scripting Merging two files by comparing three fields Post 302323325 by Hunter85 on Saturday 6th of June 2009 04:06:12 PM
Old 06-06-2009
MySQL Merging two files by comparing three fields

Hi Experts,

I need your timely help. I have a problem with merging two files. Here my situation :

Here I have to compare first three fields from FILE1 with FILE2. If they are equal, I have to append the remaining values from FILE2 with FILE1 to create the output.

FILE1:
Class Category Item Field1 Field2 Field3
Class1 Sports Ball 11 12 13
Class2 Academic Bat 21 22 23
Class3 Academic Pen 31 32 33
Class4 Gift Birthday 41 42 43

FILE2:
Class Category Item Field4 Field5
Class1 Sports Ball 14 15
Class2 Academic Bat 24 25
Class3 Academic Pen 34 35
Class5 Books Maths 54 55

OUTPUT FILE (FILE3) :

Class Category Item Field1 Field2 Field3 Field4 Field5
Class1 Sports Ball 11 12 13 14 15
Class2 Academic Bat 21 22 23 24 25
Class3 Academic Pen 31 32 33 34 35
Class4 Gift Birthday 41 42 43 0 0


Your valuable suggestions are highly appreciated. Thankyou very much.

PS : If it contains only one field to compare from both file, "Join" command would help to create the output.

join -a1 -e "0" FILE1 FILE2

Last edited by Hunter85; 06-06-2009 at 05:12 PM..
 

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MELD(1) 						      General Commands Manual							   MELD(1)

NAME
meld - Visual diff and merge tool for the GNOME Desktop SYNOPSIS
meld [options] meld [options] FILE1 meld [options] DIR1 meld [options] FILE1 FILE2 [FILE3] meld [options] DIR1 DIR2 [DIR3] DESCRIPTION
Meld is a graphical diff viewer and merge application for the Gnome desktop. It supports 2 and 3-file diffs, recursive directory diffs, diffing of directories under version control (Arch, Bazaar, Codeville, CVS, Darcs, Git, Mercurial, Monotone, RCS), as well as the ability to manually and automatically merge file differences. OPTIONS
--auto-compare, -a Automatically compare all differing files on startup. --diff FILE1|DIR1 FILE2|DIR2 [FILE3|DIR3] Create a diff tab for the given files or directories. Note that "meld --diff FILE1 FILE2" is functionally equivalent to "meld FILE1 FILE2". However, the --diff argument can be given multiple times for one invocation of meld which allows the user to automatically initiate multiple diffs when meld starts. See examples below. --help, -h Print application help and usage. --LABEL=<label>, -L <label> Set application window title to <label>. --version Print application version and exit. EXAMPLES
meld Run meld without initiating a diff. meld FILE1 Initiate a diff between FILE1 and the version-controlled copy of FILE1. meld DIR1 Initiate a recursive diff between DIR1 and the version-controlled copy of DIR1. meld FILE1 FILE2 Initiate a diff between FILE1 and FILE2. meld FILE1 FILE2 FILE3 Initiate a 3-way diff between FILE1, FILE2, and FILE3. meld DIR1 DIR2 Initiate a recursive diff between directory DIR1 and DIR2. meld DIR1 DIR2 DIR3 Initiate a recursive 3-way diff between directory DIR1, DIR2, and DIR3. meld --diff FILE1 FILE2 --diff FILE3 FILE4 Initiate a diff between FILE1 and FILE2, and a separate diff between FILE3 and FILE4. BUGS
If you find a bug, please report it at https://bugzilla.gnome.org/buglist.cgi?product=meld or mail a description of the issue to meld- list@gnome.org. AUTHORS
See the AUTHORS text file in meld's source code (http://git.gnome.org/browse/meld/tree/AUTHORS). 26 Sept 2010 MELD(1)
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