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Top Forums UNIX for Dummies Questions & Answers CSV file:Find duplicates, save original and duplicate records in a new file Post 302536497 by arvindosu on Tuesday 5th of July 2011 02:59:37 PM
Old 07-05-2011
CSV file:Find duplicates, save original and duplicate records in a new file

Hi Unix gurus,

Maybe it is too much to ask for but please take a moment and help me out. A very humble request to you gurus. I'm new to Unix and I have started learning Unix. I have this project which is way to advanced for me.

File format: CSV file
File has four columns with no header
File Size is 120GB.

Here are a few sample rows:

Code:
72426459560          2010-06-2 ABC                           LC11100619758

95327GNFA4S          2010-06-2 XYZ                           97BCX3AMD10G

95327GNFA4S          2010-06-2 XYZ                           97BCX3AMKLMO

900278VGA4T          2010-06-2 KLM                            QVA697C8LAYMACBF

900278VG567          2010-06-2 LUF                            QVA697C8LAYMACBF

There are duplicates in column 1 and 4 (I know this for a fact).
I would like to find all the duplicates in column 1 and 4. In the example above, I want rows 2 and 3 (since the columns 1 has duplicates) and also rows 4 and 5 (since column four has duplicates).

If this is too complicated, may be I can look for duplicates in column 1 first and save a new file and then look for duplicates in column 4. (Since I am new to Unix, may be thats the way to go)

I want to save all the duplicates with original records (as in the example above) in a new CSV file.

---------- Post updated at 01:59 PM ---------- Previous update was at 01:56 PM ----------

For more clarity: My results would look like this:

Code:
95327GNFA4S 2010-06-2 XYZ 97BCX3AMD10G

95327GNFA4S 2010-06-2 XYZ 97BCX3AMKLMO

900278VGA4T 2010-06-2 KLM QVA697C8LAYMACBF

900278VG567 2010-06-2 LUF QVA697C8LAYMACBF

 

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MSGUNIQ(1)								GNU								MSGUNIQ(1)

NAME
msguniq - unify duplicate translations in message catalog SYNOPSIS
msguniq [OPTION] [INPUTFILE] DESCRIPTION
Unifies duplicate translations in a translation catalog. Finds duplicate translations of the same message ID. Such duplicates are invalid input for other programs like msgfmt, msgmerge or msgcat. By default, duplicates are merged together. When using the --repeated option, only duplicates are output, and all other messages are discarded. Comments and extracted comments will be cumulated, except that if --use-first is specified, they will be taken from the first translation. File positions will be cumulated. When using the --unique option, duplicates are discarded. Mandatory arguments to long options are mandatory for short options too. Input file location: INPUTFILE input PO file -D, --directory=DIRECTORY add DIRECTORY to list for input files search If no input file is given or if it is -, standard input is read. Output file location: -o, --output-file=FILE write output to specified file The results are written to standard output if no output file is specified or if it is -. Message selection: -d, --repeated print only duplicates -u, --unique print only unique messages, discard duplicates Input file syntax: -P, --properties-input input file is in Java .properties syntax --stringtable-input input file is in NeXTstep/GNUstep .strings syntax Output details: -t, --to-code=NAME encoding for output --use-first use first available translation for each message, don't merge several translations --color use colors and other text attributes always --color=WHEN use colors and other text attributes if WHEN. WHEN may be 'always', 'never', 'auto', or 'html'. --style=STYLEFILE specify CSS style rule file for --color -e, --no-escape do not use C escapes in output (default) -E, --escape use C escapes in output, no extended chars --force-po write PO file even if empty -i, --indent write the .po file using indented style --no-location do not write '#: filename:line' lines -n, --add-location generate '#: filename:line' lines (default) --strict write out strict Uniforum conforming .po file -p, --properties-output write out a Java .properties file --stringtable-output write out a NeXTstep/GNUstep .strings file -w, --width=NUMBER set output page width --no-wrap do not break long message lines, longer than the output page width, into several lines -s, --sort-output generate sorted output -F, --sort-by-file sort output by file location Informative output: -h, --help display this help and exit -V, --version output version information and exit AUTHOR
Written by Bruno Haible. REPORTING BUGS
Report bugs to <bug-gnu-gettext@gnu.org>. COPYRIGHT
Copyright (C) 2001-2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for msguniq is maintained as a Texinfo manual. If the info and msguniq programs are properly installed at your site, the command info msguniq should give you access to the complete manual. GNU gettext-tools 0.18.1 June 2010 MSGUNIQ(1)
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