Remove duplicate records


 
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# 8  
Old 03-03-2010
Code:
>cut -d";" -f1,2,4 <scottn.txt | sort | uniq -u | gawk 'IFS=OFS=FS=";"{print $1,$2,".*",$3}' >match.txt
>grep -f match.txt <scottn.txt

sort -t\; -k1,1 -k2,2 -k4,4 scottn.txt | sed 's/[^;]*;/*;/3' | uniq -u > match.txt
grep -f match.txt scottn.txt

it is failing for the fields having $ ( ) characters.

Last edited by Scott; 03-03-2010 at 12:52 PM.. Reason: Code tags, please...
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RECDEL(1)							   User Commands							 RECDEL(1)

NAME
recdel - remove records from a recfile SYNOPSIS
recdel [OPTIONS]... [-t TYPE] [-n NUM | -e EXPR | -q STR | -m NUM] [FILE] DESCRIPTION
Remove (or comment out) records from a rec file. -c, --comment comment out the matching records instead of deleting them. --force delete even in potentially dangerous situations, and if the deletion is violating record restrictions. --no-external don't use external descriptors. --verbose give a detailed report if the integrity check fails. --help print a help message and exit. --version show version and exit. Record selection options: -i, --case-insensitive make strings case-insensitive in selection expressions. -t, --type=TYPE operate on records of the specified type only. -e, --expression=EXPR selection expression. -q, --quick=STR select records with fields containing a string. -n, --number=NUM,... select specific records by position, with ranges. -R, --random=NUM select a given number of random records. If no FILE is specified then the command acts like a filter, getting the data from standard input and writing the result to standard out- put. AUTHOR
Written by Jose E. Marchesi. REPORTING BUGS
Report bugs to: bug-recutils@gnu.org GNU recutils home page: <http://www.gnu.org/software/recutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2010, 2011, 2012 Jose E. Marchesi. 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 recdel is maintained as a Texinfo manual. If the info and recdel programs are properly installed at your site, the command info recdel should give you access to the complete manual. recdel 1.4.93 January 2012 RECDEL(1)