Oracle Pivot - converting values into columns

Question

I have table in Oracle 11g with 3 fields:

 STUDYID  |  STUDY_PARAMETER  | STUDY_VALUE

  5268    |  Age Group        | ADULT (18-65)
  5269    |  Age Group        | ADULT (18-65)
  5270    |  Age Group        | ADULT (18-65)
  5271    |  Age Unit         | ADULT (18-65)    
  1668A   |  Trial Type       | ADULT (18-65)
  5273    |  Trial Type       | Dispensing
  5345    |  Age Unit         | Years
  1668AC  |  Age Group        | ADULTS (18-39)

So, what I need is to display values in this order:

STUDY_ID  |  AGE_GROUP     |  AGE_UNIT |  TRIAL_TYPE

  5268    |  ADULT (18-65) |  Years    | Dispensing
  5269    |  ADULT (18-65) |  (null)   | (null)
  1668AC  |  ADULTS (18-39)|  Years    | Non - Dispensing

and so on.

What I have so far is:

SELECT *
FROM  (
        SELECT STUDYID, STUDY_VALUE, STUDY_PARAMETER
        FROM   RD.STUDY_INFO
      )
PIVOT (
        SUM(STUDY_VALUE)
        FOR (STUDY_PARAMETER) 
        IN (
              'Age Unit' AS AGE_UNIT,
              'Age Group' AS AGE_GROUP,
              'Trial Type' AS TRIAL_TYPE
           )
      );

I learned this from examples on the net but I am not sure if I can use SUM() like this...?!

I get this error:

ORA-01722: invalid number
01722. 00000 -  "invalid number"

Does anyone see what I am doing wrong?

I tried using MAX() aggregate fun and it seems like it is working. im testing it right now. — Angelina
– Angelina, Commented Jun 14, 2013 at 20:14

Taryn · Accepted Answer · 2013-06-15 23:24:30Z

3

Since the STUDY_VALUE column appears to be a string, you will need to use either the max() or min() aggregate function on the values:

SELECT *
FROM  
(
  SELECT STUDYID, STUDY_VALUE, STUDY_PARAMETER
  FROM   STUDY_INFO
)
PIVOT 
(
  MAX(STUDY_VALUE)
  FOR (STUDY_PARAMETER) IN ('Age Unit' AS AGE_UNIT,
                              'Age Group' AS AGE_GROUP,
                              'Trial Type' AS TRIAL_TYPE)
);

See SQL Fiddle with Demo

answered Jun 15, 2013 at 23:24

Taryn

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Comments

Priscilla Jobin · Accepted Answer · 2013-06-17 11:34:20Z

2

You can try this query.

SELECT 
ID,
MAX(Case When parameter='Age Group' then Value else '0' end) AS  AgeGroup,
MAX(Case When parameter='Trial Type' then Value else '0'end)AS  TrialType,
MAX(Case When parameter='Age Unit' then Value else '0'end)AS  AgeUnit
FROM teststack
GROUP BY ID 
ORDER BY ID

edited Jun 17, 2013 at 11:34

answered Jun 17, 2013 at 6:42

Priscilla Jobin

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