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Full Discussion: using join command for files
Special Forums Hardware Filesystems, Disks and Memory using join command for files Post 26232 by peter.herlihy on Tuesday 13th of August 2002 06:19:52 PM
Old 08-13-2002
You can acheive this with a combination of awk and join.

i.e.
File_one has 4 columns "first name, lastname, age, height"
File_two has 3 columns "first name, lastname, weight"

You want the output to have "first name, lastname, age, height, weight" - for only those records with a weight present - and your key is first and last name.

Code:
awk '
BEGIN { OFS = "," } { print $1 $2 , $1, $2, $3 ,$4 } 
' File_one > temp_File_one 
#
awk '
BEGIN { OFS = "," } { print $1 $2 , $1, $2, $3 } 
' File_two> temp_File_two
#
join -t ","  -j1 1 -j2 1 -o 1.2 1.3 1.4 1.5 2.4  temp_File_one temp_File_two > File_three

 

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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). Free Software Foundation Nov 3 1999 IGAWK(1)
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