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Re: join ?


From: Andreas Schwab
Subject: Re: join ?
Date: Fri, 17 Oct 2008 13:13:14 +0200
User-agent: Gnus/5.110009 (No Gnus v0.9) Emacs/22.2 (gnu/linux)

address@hidden writes:

> I have the following question about the join command. I thought join would 
> merge the columns of different files when the same index or value is 
> present in the specified columns.

The input must be sorted on the join filed.

> For example, I created the following files:
> echo 84 150 | gawk '{for (i=$1;i<=$2;i++) printf "%i %s\n", i,"A"}' > 

$ echo 84 150 | gawk '{for (i=$1;i<=$2;i++) printf "%i %s\n", i,"A"}' | sort -c 
-k 1b,1
sort: -:17: disorder: 100 A

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."




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