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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 302735909 by pchang on Monday 26th of November 2012 11:04:54 AM
Old 11-26-2012
Using awk to read one file and search in another file
Hi Forum.

I did some google search on what I'm trying to do but I cannot get my code to work correctly. I have 2 files which are very large and I want to read text from file1 and search in file2 - if present, keep the records.

I've tried fgrep -f file1 file2 but it is too slow.
Code:
File1:
00000014|

File2:
00000014|XSELL_ASP||Y|
00000014|XSELL_RSP||Y|
00000014|XSELL_ISA||Y|
00000014|XSELL_THRIVE||Y|
00000132|XSELL_ISA||Y|
00000132|XSELL_RSP|0.0014960810|N|
00000132|XSELL_THRIVE|0.0078523404|N|

Output File3 should be:
Code:
00000014|XSELL_ASP||Y|
00000014|XSELL_RSP||Y|
00000014|XSELL_ISA||Y|
00000014|XSELL_THRIVE||Y|

Here's my code so far (based on examples found on forum):

Code:
awk -F"|" '
  FNR==NR {f1[$1];next}
  (($1 SUBSEP) in f1)
' file1 file2

Can someone help out?

Thanks.
Last edited by vbe; 11-26-2012 at 12:52 PM.. Reason: completed code tags
 

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LEARN ABOUT SUSE

xzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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