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Full Discussion: To compare two columns
Top Forums Shell Programming and Scripting To compare two columns Post 302844144 by Don Cragun on Friday 16th of August 2013 04:33:47 PM
Old 08-16-2013
Your description of what you want done and your statement of what should be in File3.txt don't match. If you don't give us a clear description and example of what you want done, we can only waste time guessing at what you want to do.

For the sample input you provided and the sample output you say you want, the simple solution is the following command:
Code:
cp File1.txt File3.txt

A simple way to do what you said you wanted done (ignoring the samples your provided) would be something like:
Code:
awk -F "|" '
FNR == NR {f[$1] = $0;next}
$1 in f {print f[$1]}' File1.txt File2.txt > File3.txt

 

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X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME
x2sys_merge - Merge an updated COEs tables SYNOPSIS
x2sys_merge -Amain_COElist.d -Mnew_COElist.d DESCRIPTION
x2sys_merge will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second file should only contain updated COEs relatively to the first one. That is, it MUST NOT contain any new two tracks intersections (This point is NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had to recompute only the COEs between the edited files and the rest of the database. -A Specify the file main_COElist.d with the main crossover error data base. -M Specify the file new_COElist.d with the newly computed crossover error data base. OPTIONS
No space between the option flag and the associated arguments. EXAMPLES To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt SEE ALSO
x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1) GMT 4.5.7 15 Jul 2011 X2SYS_MERGE(1gmt)
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