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Top Forums UNIX for Advanced & Expert Users How to compare two files using UNIX? Post 302464060 by gpsridhar on Tuesday 19th of October 2010 07:30:18 AM
Old 10-19-2010
How to compare two files using UNIX?

I have two files which have primary key(s) for each row.

I need to compare both the files and produce the output in the following format.

Code:
 
Primary key(s),file1 value,file2 value.

Both the input files will be comma separated files.

I have accomplished this using perl, but it is taking around two hours to generate the ouput for files with 50000 lines.

Can it be done using shell or awk in a much faster way?
 

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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 xzdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), bzip2(1), or lzop(1). All options specified are passed directly to cmp(1) or diff(1). If only one file is specified, then the files compared are file1 (which must have a suffix of a supported compression format) and file1 from which the compression format suffix has been stripped. If two files are specified, then they are uncompressed if necessary and fed to cmp(1) or diff(1). The exit status from cmp(1) or diff(1) 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), lzop(1), zdiff(1) BUGS
Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified. Tukaani 2011-03-19 XZDIFF(1)
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