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Full Discussion: Emulate group-by in shell script
Top Forums Shell Programming and Scripting Emulate group-by in shell script Post 302994406 by mukulverma2408 on Wednesday 22nd of March 2017 01:58:01 PM
Old 03-22-2017
Emulate group-by in shell script
Hello All,

I saw this problem on one of the forum and solved it using group-by in oracle sql, though I am a bit curious to implement it using shell script :

There is a file having number of operations :
Code:
Opeation,Time-Taken
operation1,83621
operation2,72321
operation3,13288
operation2,12312
operation1,12321
operation2,45455
operation2,42543
operation1,87934
operation4,94865
operation5,27383
operation6,322
operation6,93483
operation7,3223

My task is to find the min and max time taken by each operation. Expected output :
Code:
operation1,12321,87934
operation2,12312,72321
operation3,13288,13288
operation4,94865,94865
operation5,27383,27383
operation6,322,93483
operation7,3223,3223

I have tried solving it using combination of sort and uniq but not successful :
Code:
sort -nk 2 | uniq

Any help is highly appreciated.
 

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LEARN ABOUT SUSE

sg

newgrp(1)						      General Commands Manual							 newgrp(1)

NAME

       newgrp -  change effective group ID sg - execute command with different group ID

SYNOPSIS

       newgrp [-l] [group]
       sg group -c command

DESCRIPTION

       The  newgrp  command changes the user's real and effetive group ID by replacing the current shell with a new shell. A new shell is launched
       even if an error occours.

       A password is requested if the group has a password and the user is not listed in the group file as being a member of that group. The pass-
       word can be changed with the gpasswd(1) command.

       If the new effective group ID is not in the supplementary group list, newgrp will add the new group ID to the supplementary list, too.

       With  no  operands  and options, newgrp changes the user's group IDs (real and effective) back to the group specified in password and group
       file.

       The sg command works like the newgrp command, except that it executes the given command with /bin/sh and upon exit the group ID of the cur-
       rent shell is not changed.

OPTIONS

       -l, --login
	      reinitialize the environment as if the user logged in.

       --help Print a help list.

       -u, --usage
	      Print a short usage message.

       -v, --version
	      Print program version.

SEE ALSO

       gpasswd(1), group(5), passwd(1), passwd(5), su(1)

AUTHOR

       Thorsten Kukuk <kukuk@suse.de>

pwdutils							    April 2004								 newgrp(1)
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