How to transpose Row to Column heading

Question

Hi,
I have a table with following data.
ID     COLUMN_NAME     COLUMN_DATA
198     LAST_NAME     OConnell
198     HIRE_DATE     6/21/1999
198     JOB_ID     SH_CLERK
198     FIRST_NAME     Donald
198     DEPARTMENT_ID     50
199     FIRST_NAME     Jennifer
199     LAST_NAME     Whalen
199     HIRE_DATE     9/17/1987
199     JOB_ID     AD_ASST
199     DEPARTMENT_ID     10
I want to transpose the data in the field column_name as column heading and corresponding data in the field column_data as row under it.
Thanks $ Regards
Manisha

Answer 1

If you have 11g, you can do this...
With T As (
select '198' ID ,'LAST_NAME' COLUMN_NAME ,'OConnell' COLUMN_DATA from dual union all
select '198','HIRE_DATE','6/21/1999' from dual union all
select '198','JOB_ID','SH_CLERK' from dual union all
select '198','FIRST_NAME','Donald' from dual union all
select '198','DEPARTMENT_ID','50' from dual union all
select '199','FIRST_NAME','Jennifer' from dual union all
select '199','LAST_NAME','Whalen' from dual union all
select '199','HIRE_DATE','9/17/1987' from dual union all
select '199','JOB_ID','AD_ASST' from dual union all
select '199','DEPARTMENT_ID','10' from dual
--End of sample data
select ID,LAST_NAME,HIRE_DATE,JOB_ID,FIRST_NAME,DEPARTMENT_ID from T
pivot (max(column_data) for
column_name in ('LAST_NAME' as LAST_NAME,'HIRE_DATE' as HIRE_DATE,'JOB_ID' as JOB_ID,'FIRST_NAME' as FIRST_NAME,'DEPARTMENT_ID' as DEPARTMENT_ID))
ID  LAST_NAME HIRE_DATE JOB_ID    FIRST_NAM DEPARTMEN
198 OConnell  6/21/1999 SH_CLERK  Donald    50
199 Whalen    9/17/1987 AD_ASST   Jennifer  10
Elapsed: 00:00:00.00or if 10g or older
With T As (
select '198' ID ,'LAST_NAME' COLUMN_NAME ,'OConnell' COLUMN_DATA from dual union all
select '198','HIRE_DATE','6/21/1999' from dual union all
select '198','JOB_ID','SH_CLERK' from dual union all
select '198','FIRST_NAME','Donald' from dual union all
select '198','DEPARTMENT_ID','50' from dual union all
select '199','FIRST_NAME','Jennifer' from dual union all
select '199','LAST_NAME','Whalen' from dual union all
select '199','HIRE_DATE','9/17/1987' from dual union all
select '199','JOB_ID','AD_ASST' from dual union all
select '199','DEPARTMENT_ID','10' from dual
--End of sample data
select * from (
select id,
max(decode(column_name,'LAST_NAME', COLUMN_DATA)) LAST_NAME,
max(decode(column_name,'HIRE_DATE', COLUMN_DATA)) HIRE_DATE,
max(decode(column_name,'JOB_ID', COLUMN_DATA)) JOB_ID,
max(decode(column_name,'FIRST_NAME', COLUMN_DATA)) FIRST_NAME,
max(decode(column_name,'DEPARTMENT_ID', COLUMN_DATA)) DEPARTMENT_ID
from T group by id)
order by ID
PRAZY@11gR1> /
ID  LAST_NAME HIRE_DATE JOB_ID    FIRST_NAM DEPARTMEN
198 OConnell  6/21/1999 SH_CLERK  Donald    50
199 Whalen    9/17/1987 AD_ASST   Jennifer  10
Elapsed: 00:00:00.01Regards,
Prazy
Edited by: Prazy on Apr 5, 2010 3:32 PM
Added sql for older versions