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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 303036866 by Perlbaby on Monday 15th of July 2019 05:53:36 AM
Old 07-15-2019
Hi Corona688 Thank you for quick help on this . However I would need further info on the handling scenarios when we have multiple column in a table .

Code:
 
 SELECT
 Employee_ID 
 LISTAGG(COUNTRIES_OUT, ',') WITHIN GROUP(ORDER BY Employee_ID) AS "COUNTRIES_OUT" 
 FROM 
 LOCATION 
 GROUP BY 
 Employee_ID
 Output 
 
 Employee_ID ,               COUNTRIES_OUT 
 1234                    MEXICO,UNITED STATES, INDIA, JAPAN,UNITED KINGDOM,PHILIPPINES

The above observation is fine as I am using only one column "COUNTRIES_OUT" and grouped against one column "Employee_ID"
Now the challenge is when I add new column to replicate same logic

Code:
 
 SELECT
 Employee_ID 
 LISTAGG(COUNTRIES_OUT, ',') WITHIN GROUP(ORDER BY Employee_ID) AS "COUNTRIES_OUT" ,
 LISTAGG(COUNTRIES_IN, ',') WITHIN GROUP(ORDER BY Employee_ID) AS "COUNTRIES_IN"  ( This is newly added which has only one country ) 
 FROM 
 LOCATION 
 GROUP BY 
 Employee_ID
 Output 
 Employee_ID ,                                                    COUNTRIES_OUT                                                                                                                    COUNTRIES_IN 
 1234                  MEXICO,UNITED STATES, INDIA, JAPAN,UNITED KINGDOM,PHILIPPINES                                              UNITED STATES,UNITED STATES,UNITED STATES,UNITED STATES,UNITED STATES,UNITED STATES

The above output give 6 times UNITED STATES for column COUNTRIES_IN even though it appears once .
Code:
 
 How can I get the output like below 
 
 Employee_ID ,                                                    COUNTRIES_OUT                                                                                                                    COUNTRIES_IN 
 1234                  MEXICO,UNITED STATES, INDIA, JAPAN,UNITED KINGDOM,PHILIPPINES                                                                                     UNITED STATES

Please guide . any help appreciated
 

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LEARN ABOUT DEBIAN

mfontset_lookup

mfontset_lookup(3m17n)						 The m17n Library					    mfontset_lookup(3m17n)

NAME

       mfontset_lookup - Lookup a fontset.

SYNOPSIS

       MPlist * mfontset_lookup (MFontset * fontset, MSymbol script, MSymbol language, MSymbol charset)

DESCRIPTION

       Lookup a fontset. The mfontset_lookup() function lookups fontset and returns a plist that describes the contents of fontset corresponding
       to the specified script, language, and charset.

       If script is Mt, keys of the returned plist are script name symbols for which some fonts are specified and values are NULL.

       If script is a script name symbol, the returned plist is decided by language.

       o If language is Mt, keys of the plist are language name symbols for which some fonts are specified and values are NULL. A key may be Mt
	 which means some fallback fonts are specified for the script.
       o If language is a language name symbol, the plist is a FONT-GROUP for the specified script and language.  FONT-GROUP is a plist whose keys
	 are FLT (FontLayoutTable) name symbols (Mt if no FLT is associated with the font) and values are pointers to MFont.
       o If language is Mnil, the plist is fallback FONT-GROUP for the script.
       If script is Mnil, the returned plist is decided as below.
       o If charset is Mt, keys of the returned plist are charset name symbols for which some fonts are specified and values are NULL.
       o If charset is a charset name symbol, the plist is a FONT-GROUP for the charset.
       o If charset is Mnil, the plist is a fallback FONT-GROUP.
RETURN VALUE

	   It returns a plist describing the contents of a fontset. The plist should be freed by m17n_object_unref().
COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 					    mfontset_lookup(3m17n)
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