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Top Forums Shell Programming and Scripting CSV with commas in field values, remove duplicates, cut columns Post 302580066 by krishnix on Wednesday 7th of December 2011 10:35:37 AM
Old 12-07-2011
CSV with commas in field values, remove duplicates, cut columns

Hi

Description of input file I have:
-------------------------
1) CSV with double quotes for string fields.
2) Some string fields have Comma as part of field value.
3) Have Duplicate lines
4) Have 200 columns/fields
5) File size is more than 10GB

Description of output file I need:
-------------------------------
1) Can be of CSV or Pipe delimited
2) But Comma within field value should remain
3) No Duplicate lines
4) I need only first 150 columns

Code I used till now:
-------------------
Code:
cat file.in | awk -F"," '!($1$2$3 in a){a[$1$2$3];print $0}' | cut -d, -f1-150 > file.out

But with this code, comma's within field value is treated as delimiter.
 

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CUT(1)									FSF								    CUT(1)

NAME
cut - remove sections from each line of files SYNOPSIS
cut [OPTION]... [FILE]... DESCRIPTION
Print selected parts of lines from each FILE to standard output. Mandatory arguments to long options are mandatory for short options too. -b, --bytes=LIST output only these bytes -c, --characters=LIST output only these characters -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST output only these fields; also print any line that contains no delimiter character, unless the -s option is specified -n with -b: don't split multibyte characters -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter --help display this help and exit --version output version information and exit Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Each range is one of: N N'th byte, character or field, counted from 1 N- from N'th byte, character or field, to end of line N-M from N'th to M'th (included) byte, character or field -M from first to M'th (included) byte, character or field With no FILE, or when FILE is -, read standard input. AUTHOR
Written by David Ihnat, David MacKenzie, and Jim Meyering. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for cut is maintained as a Texinfo manual. If the info and cut programs are properly installed at your site, the command info cut should give you access to the complete manual. cut (coreutils) 4.5.3 February 2003 CUT(1)
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