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 (         


        

Answer 1

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

Answer 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