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Shell Programming and Scripting
merging of 2 files AWK, SHELL or something else
Post 302299231 by vidyak on Thursday 19th of March 2009 02:07:46 PM
03-19-2009
Hi,
I have stumbled upon many awk scripts which does merging of information from 2 files. I tried to use some of them for my task, but nothing really helped me in accomplishing my desired output
Here is what I am try to do ....
I have 2 files - main.txt and alternate.txt. Contents of main.txt is as given below -
A123|msg a 1|date a 1|other info a 1
B234|msg b 1|date b 1|other info b 1
C123|msg c 1|date c 1|other info c 1
D456|msg d 1|date d 1|other info d 1
.....
and so on
Contents of alternate.txt is as given below -
B234|1.1|msg b 2|remarks 1
B234|1.2|msg b 3|remarks 2
D456|1.1|msg d 2|remarks 1
D456|1.2|msg d 3|remarks 2
D456|1.3|msg d 4|remarks 3
D456|1.4|msg d 5|remarks 4
..... and so on.
Common key between the above files is column 1 (A123, B234, etc.). I want to consolidate the information available in the 2 files such that the result is as given below -
A123|msg a 1|date a 1|other info a 1
B234|msg b 1|date b 1|other info b 1
B234|1.1|msg b 2|remarks 1
B234|1.2|msg b 3|remarks 2
C123|msg c 1|date c 1|other info c 1
D456|msg d 1|date d 1|other info d 1
D456|1.1|msg d 2|remarks 1
D456|1.2|msg d 3|remarks 2
D456|1.3|msg d 4|remarks 3
D456|1.4|msg d 5|remarks 4
Basically, for every record which is present in main file, if there are any entries in alternate file, print those records subsequently in the result file. Any help with this is highly appreciated.
Thanks and Regards,
Vidya
I have stumbled upon many awk scripts which does merging of information from 2 files. I tried to use some of them for my task, but nothing really helped me in accomplishing my desired output
Here is what I am try to do ....
I have 2 files - main.txt and alternate.txt. Contents of main.txt is as given below -
A123|msg a 1|date a 1|other info a 1
B234|msg b 1|date b 1|other info b 1
C123|msg c 1|date c 1|other info c 1
D456|msg d 1|date d 1|other info d 1
.....
and so on
Contents of alternate.txt is as given below -
B234|1.1|msg b 2|remarks 1
B234|1.2|msg b 3|remarks 2
D456|1.1|msg d 2|remarks 1
D456|1.2|msg d 3|remarks 2
D456|1.3|msg d 4|remarks 3
D456|1.4|msg d 5|remarks 4
..... and so on.
Common key between the above files is column 1 (A123, B234, etc.). I want to consolidate the information available in the 2 files such that the result is as given below -
A123|msg a 1|date a 1|other info a 1
B234|msg b 1|date b 1|other info b 1
B234|1.1|msg b 2|remarks 1
B234|1.2|msg b 3|remarks 2
C123|msg c 1|date c 1|other info c 1
D456|msg d 1|date d 1|other info d 1
D456|1.1|msg d 2|remarks 1
D456|1.2|msg d 3|remarks 2
D456|1.3|msg d 4|remarks 3
D456|1.4|msg d 5|remarks 4
Basically, for every record which is present in main file, if there are any entries in alternate file, print those records subsequently in the result file. Any help with this is highly appreciated.
Thanks and Regards,
Vidya
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LEARN ABOUT OPENSOLARIS
igawk
IGAWK(1) Utility Commands IGAWK(1) NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)