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Full Discussion: DB2 Query modification to remove duplicate values using LISTAGG function
Top Forums UNIX for Beginners Questions & Answers DB2 Query modification to remove duplicate values using LISTAGG function Post 303036823 by Perlbaby on Friday 12th of July 2019 12:29:54 PM
Old 07-12-2019
DB2 Query modification to remove duplicate values using LISTAGG function
I am using DB2 v9 and trying to get country values in comma seperated format using below query

Code:
SELECT  distinct LISTAGG(COUNTRIES, ',') WITHIN GROUP(ORDER BY EMPLOYEE)  
FROM LOCATION ;

Output Achieved 
MEXICO,UNITED STATES,INDIA,JAPAN,UNITED KINGDOM,MEXICO,UNITED STATES


The table "LOCATION" has multiple columns apart from Employee and Country and hence i cant group on countries to remove duplicate countries values .
Is there a way to remove dups to get only countries once using above query with modification .

Code:
Expected Output  ( Should exclude MEXICO,UNITED STATES as these two countries are duplicated) 
MEXICO,UNITED STATES,INDIA,JAPAN,UNITED KINGDOM

Any help appreciated.
 

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LEARN ABOUT DEBIAN

sql::reservedwords::db2

SQL::ReservedWords::DB2(3pm)				User Contributed Perl Documentation			      SQL::ReservedWords::DB2(3pm)

NAME

       SQL::ReservedWords::DB2 - Reserved SQL words by DB2

SYNOPSIS

	  if ( SQL::ReservedWords::DB2->is_reserved( $word ) ) {
	      print "$word is a reserved DB2 word!";
	  }

DESCRIPTION

       Determine if words are reserved by DB2.

METHODS

       is_reserved( $word )
	   Returns a boolean indicating if $word is reserved by either DB2 5, 6, 7 or 8.

       is_reserved_by_db2v5( $word )
	   Returns a boolean indicating if $word is reserved by DB2 5.

       is_reserved_by_db2v6( $word )
	   Returns a boolean indicating if $word is reserved by DB2 6.

       is_reserved_by_db2v7( $word )
	   Returns a boolean indicating if $word is reserved by DB2 7.

       is_reserved_by_db2v8( $word )
	   Returns a boolean indicating if $word is reserved by DB2 8.

       reserved_by( $word )
	   Returns a list with DB2 versions that reserves $word.

       words
	   Returns a list with all reserved words.

EXPORTS

       Nothing by default. Following subroutines can be exported:

       is_reserved
       is_reserved_by_db2v5
       is_reserved_by_db2v6
       is_reserved_by_db2v7
       is_reserved_by_db2v8
       reserved_by
       words

SEE ALSO

       SQL::ReservedWords

       <http://www-306.ibm.com/software/data/db2/udb/>

AUTHOR

       Christian Hansen "chansen@cpan.org"

COPYRIGHT

       This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.8.8							    2008-03-28					      SQL::ReservedWords::DB2(3pm)
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