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Top Forums Shell Programming and Scripting Compare two columns and replacing it with value from third column!! Post 302960846 by DJose on Friday 20th of November 2015 06:08:17 AM
Old 11-20-2015
Hello,

I need to understand if nawk would perform faster than the awk command in terms of huge volumes of data (say ~ 1GB).

Also, I would be grateful, if someone could share the replacement code for the below awk command in nawk.

Code:
awk 'NR==FNR{A[$1,$2]=$1; next} ($2,$3) in A(print $0}' FS="|" OFS="|" file1 file2 > file3

(The scenario is same as the one found in this thread)

Thanks in advance,
DJose

Last edited by Scrutinizer; 11-20-2015 at 08:25 PM.. Reason: code tags
 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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