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Top Forums Shell Programming and Scripting selecting record by matching in two columns values Post 302556413 by ourned on Sunday 18th of September 2011 12:20:49 PM
Old 09-18-2011
Java

Hi Scrutinizer !

i found the solution just wanted to share with you i used the back tracking technique

i first selected all the value = 20 from column 3 and then applied the cut on the first column like that...

but can you help me with what 's/ *\(.*\) \(.*\)/\2 \1/' is doing extactly?

Code:
grep '" 20 ' filename | cut -f1 -d' '| sort | uniq -c | sort -nr | sed 's/ *\(.*\) \(.*\)/\2  \1/' | column -t

BR,

TJ

---------- Post updated at 11:20 AM ---------- Previous update was at 11:11 AM ----------

Hi Scrutinizer

actually i'm doing something with the values i'm getting i know awk is more flexible but in my project i have not used awk and i not good at awk so that's why from futher difficulties i don't use awk for the time being

anyways thanks for your help and time

and one last question can we use column number in the grep command? as we use it in cut -f1? just wondering what will be the structure

Last edited by radoulov; 09-18-2011 at 01:13 PM.. Reason: Code tags!
 

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CUT(1)							      General Commands Manual							    CUT(1)

NAME
cut - select out columns of a file SYNOPSIS
cut [ -b | -c] list [file...] cut -f list [-d delim] [ -s] OPTIONS
-b Cut specified bytes -c Select out specific characters -d Change the column delimiter to delim -f Select out specific fields that are separated by the -i Runs of delimiters count as one -s Suppres lines with no delimiter characters, when used EXAMPLES
cut -f 2 file # Extract field 2 cut -c 1-2,5 file # Extract character columns 1, 2, and 5 cut -c 1-5,7- file # Extract all columns except 6 DESCRIPTION
[file...]" delimiter character ( see delim)" with the -f option. Lines with no delimiters are passwd through untouched" Cut extracts one or more fields or columns from a file and writes them on standard output. If the -f flag is used, the fields are sepa- rated by a delimiter character, normally a tab, but can be changed using the -d flag. If the -c flag is used, specific columns can be specified. The list can be comma or BLANK separated. The -f and -c flags are mutually exclusive. Note: The POSIX1003.2 standard requires the option -b to cut out specific bytes in a file. It is intended for systems with multi byte characters (e.g. kanji), since MINIX uses only one byte characters, this option is equivalent to -c. For the same reason, the option -n has no effect and is not listed in this man- ual page. SEE ALSO
sed(1), awk(9). CUT(1)
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