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Top Forums Shell Programming and Scripting Help search and replace the last occurance of match in a file Post 303012370 by antosr7 on Friday 2nd of February 2018 10:32:48 PM
Old 02-02-2018
DB Help search and replace the last occurance of match in a file

Hi I want to replace only the last occurance of "union all" in input file with ";"
I tried with sed 's/union all/;/g' in my input file, it replaced in all lines of input file

Eg:
Code:
select column1,column2 from test1 group by 2 union all
 select column1,column2 from test2 group by 2 union all
 select column1,column2 from test3 group by 2 union all

I need to replace only the last "union all" in the above with ";".

Thanks

Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 02-03-2018 at 04:33 AM.. Reason: Added CODE tags.
 

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REPLACE(1)						      General Commands Manual							REPLACE(1)

NAME
replace - A utility program that is used by msql2mysql, but that has more general applicability as well. replace changes strings in place in files or on the standard input. Uses a finite state machine to match longer strings first. Can be used to swap strings. USAGE
replace [-?svIV] from to from to ... -- [files] or replace [-?svIV] from to from to ... < fromfile > tofile SYNOPSIS
replace [-?|-I] [-s] [-v] DESCRIPTION
replace -?|-I info -s silent -v verbose EXTRA INFO
Special characters in from string: ^ Match start of line. $ Match end of line.  Match space-character, start of line or end of line. For a end  the next replace starts locking at the end space-character. A  alone in a string matches only a space-character. EXAMPLE
this command swaps a and b in the given files: shell> replace a b b a -- file1 file2 ... SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror (1), replace (1), safe_mysqld (1), which1 (1), zap (1), AUTHOR
Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer- curmedia.com) 20 December 2000 REPLACE(1)
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