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Case statement returning unexpected result

Posted on 2015-01-07
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Last Modified: 2015-01-07
Gurus,

I'm using the "case" function in one of my queries and it's returning an unexpected result.

Statement:
(SELECT DISTINCT SPECIAL_CHAR(                                    
    CASE AFLFLDC                                                
      WHEN NULL                                                  
      THEN NULL                                                  
      ELSE '$'                                                  
        ||aflfldc/100                                            
    END,'fm99999.00')                                            
  FROM AFL , ART                                                      
  WHERE AFLFTYKEYI = 52                                          
  AND AFLARTKEYI   = ARTKEYI                                    
  AND aflkavkeyi   = artkavkeyi                                  
  )) AS CALCULATED_WAS;

Returns: $
Should Return: null

What am I doing wrong?
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Question by:xbox360dp
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8 Comments
 
LVL 76

Expert Comment

by:slightwv (䄆 Netminder)
ID: 40536372
What is the data type of AFLFLDC?

Try this:
(SELECT DISTINCT SPECIAL_CHAR(                                    
     CASE trim(AFLFLDC)
       WHEN NULL                                                  
       THEN NULL      
...
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Author Comment

by:xbox360dp
ID: 40536377
varchar2
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Author Comment

by:xbox360dp
ID: 40536380
Trim didn't work.
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LVL 76

Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 40536388
Found that out when I set up a test case with a varchar2 field.

Try this:
(SELECT DISTINCT SPECIAL_CHAR(                                    
     CASE WHEN AFLFLDC IS NULL                                                  
       THEN NULL                                                  
       ELSE '$'                                                   
         ||aflfldc/100                                            
     END,'fm99999.00')                                            
   FROM AFL , ART                                                      
   WHERE AFLFTYKEYI = 52                                          
   AND AFLARTKEYI   = ARTKEYI                                     
   AND aflkavkeyi   = artkavkeyi                                  
   )) AS CALCULATED_WAS;

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LVL 29

Expert Comment

by:MikeOM_DBA
ID: 40536404
You could try decode;
( SELECT DISTINCT
         Special_Char ( DECODE ( Aflfldc,  NULL, NULL
                               , '$' || TO_NUMBER( Aflfldc ) / 100, 'fm99999.00' ) )
    FROM Afl, Art
   WHERE Aflftykeyi = 52 
     AND Aflartkeyi = Artkeyi 
     AND Aflkavkeyi = Artkavkeyi 
)) AS CALCULATED_WAS;

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Expert Comment

by:slightwv (䄆 Netminder)
ID: 40536420
If you want alternatives, NVL2:

 (SELECT DISTINCT SPECIAL_CHAR(                                    
    NVL2(AFLFLDC,'$'||aflfldc/100,null)'fm99999.00')                                            
  FROM AFL , ART                                                      
  WHERE AFLFTYKEYI = 52                                          
  AND AFLARTKEYI   = ARTKEYI                                    
  AND aflkavkeyi   = artkavkeyi                                  
  )) AS CALCULATED_WAS;

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Expert Comment

by:MikeOM_DBA
ID: 40536430
Cool!
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Author Closing Comment

by:xbox360dp
ID: 40536491
Thank you!
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