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Top Forums Shell Programming and Scripting Read Two lines in a CSV File and Compare Post 302418820 by Sheel on Wednesday 5th of May 2010 12:19:34 PM
Old 05-05-2010
MySQL Read Two lines in a CSV File and Compare

@malcomex999/Jean
Thank You both for the help . The logic is working fine and i have been able to do what i wanted.

Code:
awk -F, '$7 && !dup[$2,$3,$4,$8]++' infile

But I would like to understand the logic behind -F operation. How does the deletion happen here? What is the logic behind choosing the row to be deleted?

Can i use more than one field to decide the line to be deleted.If yes, how?

@ygemici
Thnx for the code. I have not been able to implement the logic till now. Will surely get back to you after using it.

Cheers,Smilie
Sheel

Last edited by Scott; 05-05-2010 at 01:27 PM.. Reason: Code tags
 

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FORMED(1)						      General Commands Manual							 FORMED(1)

NAME
formed - formula editor for first-order logic formulas SYNOPSIS
formed [options] DESCRIPTION
This manual page documents briefly the formed command. formed is a window-based program for constructing, displaying, and managing first-order logic formulas. The main motivation for construct- ing formed was the desire to have formulas displayed in a readable, two-dimensional format. Users of formed can make two kinds of transfor- mation on formulas: (1) logic transformations, such as negation normal form translation, which preserve the meaning of a formula, and (2) edit transformations, which can be used to make arbitrary changes, such as adding a hypothesis to a subformula. formed was written by using the X Window System, Version 11, and code from the theorem prover otter. OPTIONS
A summary of options is included below. -l filename Load formulas in the specified file during startup. Formulas can also be loaded after startup with the button Load in the main menu. -f color Use the named color for the foreground on color monitors (ignored on black-and-white monitors). -b color Use the named color for the background on color monitors (ignored on black-and-white monitors). SEE ALSO
anldp(1), mace2(1), otter(1). ``FormEd: An X Window System application for managing first-order formulas'' (McCune et al.), available from http://www.osti.gov/energyci- tations/servlets/purl/6427100-WtOa4g/6427100.PDF AUTHOR
formed ws written by William McCune <otter@mcs.anl.gov> This manual page was written by Peter Collingbourne <pcc03@doc.ic.ac.uk>, for the Debian project (but may be used by others). November 5, 2006 FORMED(1)
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