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Full Discussion: Awk to print distinct col values
Top Forums Shell Programming and Scripting Awk to print distinct col values Post 302224692 by anduzzi on Wednesday 13th of August 2008 06:21:03 PM
Old 08-13-2008
Awk to print distinct col values
Hi Guys...
I am newbie to awk and would like a solution to probably one of the simple practical questions.

I have a test file that goes as:

1,2,3,4,5,6
7,2,3,8,7,6
9,3,5,6,7,3
8,3,1,1,1,1
4,4,2,2,2,2

I would like to know how AWK can get me the distinct values say for eg: on col2 and figure out that the distinct values are only 2,3,4.
I need to check my actual realtime medical file with the distinct service dates from around a relatively big 200,000 records.

And one more question is...how can I use awk to print out records which dont meet a specific criteria...like...
Eg: I want to see only those records where Distinct Col2 values are less than 10 and see the actual distinct values to figure out why they are < 10

I know I can always go for some fancy ETLs to achieve complex requirements(ofcoz this requirement is not complex anyway) and play around with the data but I wanna use the power of awk/sed to accomplish the tasks.

Help is highly appreciated.
Thank you very much
-Anduzzi
 

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LEARN ABOUT DEBIAN

rdf::query::plan::distinct

RDF::Query::Plan::Distinct(3pm) 			User Contributed Perl Documentation			   RDF::Query::Plan::Distinct(3pm)

NAME

       RDF::Query::Plan::Distinct - Executable query plan for Distincts.

VERSION

       This document describes RDF::Query::Plan::Distinct version 2.908.

METHODS

       Beyond the methods documented below, this class inherits methods from the RDF::Query::Plan class.

       "new ( $plan )"
       "execute ( $execution_context )"
       "next"
       "close"
       "pattern"
	   Returns the query plan that will be used to produce the data to be made distinct.

       "distinct"
	   Returns true if the pattern is guaranteed to return distinct results.

       "ordered"
	   Returns true if the pattern is guaranteed to return ordered results.

       "plan_node_name"
	   Returns the string name of this plan node, suitable for use in serialization.

       "plan_prototype"
	   Returns a list of scalar identifiers for the type of the content (children) nodes of this plan node. See RDF::Query::Plan for a list of
	   the allowable identifiers.

       "plan_node_data"
	   Returns the data for this plan node that corresponds to the values described by the signature returned by "plan_prototype".

       "graph ( $g )"

AUTHOR

	Gregory Todd Williams <gwilliams@cpan.org>

perl v5.14.2							    2012-01-31					   RDF::Query::Plan::Distinct(3pm)
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