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Full Discussion: Using awk to read one file and search in another file
Top Forums Shell Programming and Scripting Using awk to read one file and search in another file Post 302735927 by RudiC on Monday 26th of November 2012 11:26:19 AM
Old 11-26-2012
PLEASE use code tags.

A small modifation to your own code will make it do what you expect:
Code:
awk -F"|" '
           FNR==NR {f1[$1];next}
           ($1 in f1)
          ' file1 file2

, but I don't think it will be much faster than grep. Pls report back the time differences!
 

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LEARN ABOUT POSIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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