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Top Forums Shell Programming and Scripting Keep the last instance of the record Post 302365625 by Franklin52 on Tuesday 27th of October 2009 03:54:07 PM
Old 10-27-2009
Quote:
Originally Posted by lrkp
Hi,

It is not always 'abcde' in the last instance of a record.So, I would like to catch the last instance of a record for that key column where 1 and 2 are key's.


Thanks in advance.
Try this:

Code:
awk -F"|" 'k && $1 != k {print s}{k=$1;s=$1 FS $2}END{print s}' file


Last edited by Franklin52; 10-27-2009 at 05:07 PM.. Reason: Forgot the fieldseparator
 

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editmap(1M)						  System Administration Commands					       editmap(1M)

NAME
editmap - query and edit single records in database maps for sendmail SYNOPSIS
editmap -C file [-N] [-f] [-q | -u | -x] maptype mapname key ["value"...] DESCRIPTION
The editmap command queries or edits one record in a database maps used by the keyed map lookups in sendmail(1M). Arguments are passed on the command line and output (for queries) is directed to standard output. Depending on how it is compiled, editmap handles up to three different database formats, selected using the maptype parameter. See OPER- ANDS. If the TrustedUser option is set in the sendmail configuration file and editmap is invoked as root, the generated files are owned by the specified TrustedUser. OPTIONS
The following options are supported: -C file Use the specified sendmail configuration file (file) to look up the TrustedUser option. -f Disable the folding of all upper case letters in the key to lower case. Normally, all upper case letters in the key are folded to upper case. This is intended to mesh with the -f flag in the K line in sendmail.cf. The value is never case folded. -N Include the null byte that terminates strings in the map (for alias maps). -q Query the map for the specified key. If found, print value to standard output and exit with 0. If not found then print an error message to stdout and exit with EX_UNAVAILABLE. -u Update the record for key with value or inserts a new record if one doesn't exist. Exits with 0 on success or EX_IOERR on failure. -x Delete the specific key from the map. Exit with 0 on success or EX_IOERR on failure. OPERANDS
The following operands are supported: key The left hand side of a record. Each record is of the form: key value key and value are separated by white space. mapname File name of the database map being created. maptype Specifies the database format. The following maptype parameters are available: dbm Specifies DBM format maps. btree Specifies B-Tree format maps. hash Specifies hash format maps. value The right hand side of a record. Each record is of the form: key value key and value are separated by white space. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsndmu | +-----------------------------+-----------------------------+ SEE ALSO
makemap(1M), sendmail(1M), attributes(5) SunOS 5.10 14 Sep 2001 editmap(1M)
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