Change the value of cell then concatenate into one row SQL Server 2008

Question

So I'm trying to do several things at once and I'm not sure how to put them together.

My first step was to take multiple cells and combine them into 1 row based on id.

USE MAIN;
Select ACT.ID AS Activity

,STUFF ((       Select ',' + LE.Name AS [text()]

               FROM ActivityDemographicEthnicity ADE
                LEFT OUTER JOIN LookupEthnicity LE
                ON LE.ID  = ADE.ethinicityId 

                WHERE ACT.ID = ADE.ActivityID

                FOR XML PATH ('')),1,1,'')

            AS Ethnicity

FROM Activity ACT

This works well and produces something like this:

ID    Ethnicity
------------------------------------------
123   African, African American, Caucasian
125   Caucasian 
128   NULL

BUT I would like something like this:

ID           Ethnicity
----------------------------------------
123          African American, Caucasian
125          Caucasian
128          General Market

Where I've defined new values via a case statement:

USE Main;
(Select CASE 
            When LE.Name is null THEN 'General Market'
            When LE.Name = 'African' THEN 'African American'
            When LE.Name = 'American Indian/Native American' Then 'American Indian'
            WHEN LE.NAME = 'Cambodian' Then 'Asian'
            When LE.Name = 'Chinese' Then 'Asian'
            When LE.Name = 'Filipino' Then 'Asian'
            When LE.Name = 'Hmong' Then 'Asian'
            WHEN LE.NAME = 'Japanese' THEN 'Asian'
            WHEN LE.Name = 'Korean' Then 'Asian'
            WHEN LE.Name = 'Laotian' Then 'Asian'
            WHEN LE.Name = 'Vietnamese' Then 'Asian'
            WHEN LE.Name = 'Armenian' Then 'Other'
            WHEN LE.Name = 'Russian' Then 'Other'
            WHEN LE.Name = 'Ukranian' Then 'Other'
            WHEN LE.Name = 'Other (specify)' Then 'Other'
            Else LE.Name
            End 'Ethnicity'

            From ActivityDemographicEthnicity ADE

            LEFT JOIN LookupEthnicity LE
                ON LE.ID = ADE.ID)`

Both queries work individually but how would I combine them into one query?

Answer 1

Give this a whirl:

Select ACT.ID AS Activity,
ISNULL(STUFF((Select distinct ',' + CASE 
                When LE.Name is null THEN 'General Market'
                When LE.Name = 'African' THEN 'African American'
                When LE.Name = 'American Indian/Native American' Then 'American Indian'
                WHEN LE.NAME = 'Cambodian' Then 'Asian'
                When LE.Name = 'Chinese' Then 'Asian'
                When LE.Name = 'Filipino' Then 'Asian'
                When LE.Name = 'Hmong' Then 'Asian'
                WHEN LE.NAME = 'Japanese' THEN 'Asian'
                WHEN LE.Name = 'Korean' Then 'Asian'
                WHEN LE.Name = 'Laotian' Then 'Asian'
                WHEN LE.Name = 'Vietnamese' Then 'Asian'
                WHEN LE.Name = 'Armenian' Then 'Other'
                WHEN LE.Name = 'Russian' Then 'Other'
                WHEN LE.Name = 'Ukranian' Then 'Other'
                WHEN LE.Name = 'Other (specify)' Then 'Other'
                ELSE LE.Name
                END  
               FROM ActivityDemographicEthnicity ADE
               LEFT OUTER JOIN LookupEthnicity LE ON LE.ID  = ADE.ethnicityId 
               WHERE ACT.ID = ADE.ActivityID
               FOR XML PATH ('')),1,1,''), 'General Market') AS Ethnicity
FROM Activity ACT

You need to wrap the whole STUFF function in an ISNULL to catch the cases where an Activity doesn't have a corresponding ActivityDemographicEthnicity. And select distinct inside the STUFF to remove duplicates.

SQL Fiddle

Answer 2

I would assume that you could simply replace your original query's call to the LE.Name field with your CASE statement, as in the following:

USE MAIN;
SELECT 
    ACT.ID AS Activity,
    STUFF 
      (
        (       
            SELECT ',' + 
                CASE 
                    When LE.Name is null THEN 'General Market'
                    When LE.Name = 'African' THEN 'African American'
                    When LE.Name = 'American Indian/Native American' Then 'American Indian'
                    WHEN LE.NAME = 'Cambodian' Then 'Asian'
                    When LE.Name = 'Chinese' Then 'Asian'
                    When LE.Name = 'Filipino' Then 'Asian'
                    When LE.Name = 'Hmong' Then 'Asian'
                    WHEN LE.NAME = 'Japanese' THEN 'Asian'
                    WHEN LE.Name = 'Korean' Then 'Asian'
                    WHEN LE.Name = 'Laotian' Then 'Asian'
                    WHEN LE.Name = 'Vietnamese' Then 'Asian'
                    WHEN LE.Name = 'Armenian' Then 'Other'
                    WHEN LE.Name = 'Russian' Then 'Other'
                    WHEN LE.Name = 'Ukranian' Then 'Other'
                    WHEN LE.Name = 'Other (specify)' Then 'Other'
                ELSE LE.Name
                END AS [text()]
            FROM 
                ActivityDemographicEthnicity ADE
                 LEFT OUTER JOIN 
                LookupEthnicity LE ON 
                    LE.ID  = ADE.ethinicityId 
            WHERE ACT.ID = ADE.ActivityID

            FOR XML PATH ('')
        ),1,1,''
      ) AS Ethnicity
FROM Activity ACT

Does this work for you?