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Full Discussion: Discarding records with duplicate fields
Top Forums UNIX for Beginners Questions & Answers Discarding records with duplicate fields Post 303043653 by beca123456 on Monday 3rd of February 2020 06:19:13 AM
Old 02-03-2020
Discarding records with duplicate fields
Hi,

My input looks like this (tab-delimited):
Code:
grp1	name2	firstname	M	55	item1	item1.0
grp1	name2	firstname	F	55	item1	item1.0
grp2	name1	firstname	M	55	item1	item1.0
grp2	name2	firstname	M	55	item1	item1.0

Using awk, I am trying to discard the records with common fields 2, 4, 5, 6, 7 only for records from 'grp2' (field $1; i.e. records starting with 'grp1' should be kept no matter what) in order to get this output:
Code:
grp1	name2	firstname	M	55	item1	item1.0
grp1	name2	firstname	F	55	item1	item1.0
grp2	name1	firstname	M	55	item1	item1.0

Here is my code, but I don't see what is wrong with it.
Code:
awk '
BEGIN{FS=OFS="\t"}
{
    a[$2 FS $4 FS $5 FS $6 FS $7]

    if($1 ~ /grp2/){
        if(a[$2 FS $4 FS $5 FS $6 FS $7]++==0){
            print $0
         }
    }
    else{
        print $0
    }
}' input.tab

Any help would be greatly appreciated.
 

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LEARN ABOUT DEBIAN

recset

RECSET(1)							   User Commands							 RECSET(1)

NAME

       recset - manipulate fields in a recfile

SYNOPSIS

       recset [OPTION]... [FILE]...

DESCRIPTION

       Alter or delete fields in records.

       --no-external
	      don't use external descriptors.

       --force
	      alter the records even if violating record restrictions.

       --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.

   Field selection options:
       -f, --fields=FIELDS
	      comma-separated list of field names with optional subscripts.

   Actions:
       -s, --set=VALUE
	      change the value of the selected fields.

       -a, --add=VALUE
	      add the selected fields with the given value.

       -S, --set-add=VALUE
	      change the value of the selected fields.	If they don't exist then add a new field with that value.

       -r, --rename=NAME
	      rename  the selected fields to a given name.  If an entire record set is selected then the field is renamed in the record descriptor
	      as well.

       -d, --delete
	      delete the selected fields.

       -c, --comment
	      comment out the selected fields.

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 recset is maintained as a Texinfo manual.  If the info and recset programs are properly installed at your  site,
       the command

	      info recset

       should give you access to the complete manual.

recset 1.4.93							   January 2012 							 RECSET(1)
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