Transform columns in row for a table in Oracle 10g

Question

Hi,
I am using Oracle 10g.
There is a table (example) EMPLOYEE, with following structure
IDUSER YEAR1 YEAR2 YEAR3
12345 value1 value2 value3
99999 value7 value6 value5
and I need display :
IDUSER YEAR
12345 value1
12345 value2
12345 value3
99999 value7
99999 value6
99999 value5
How can I do this with without unpivot?
Thanks

Answer 1

Hi,
Welcome to the forum!
One way to unpivot in any version of Orace is to cross-join your table with another table (or resut set, in ths case) that has as many rows as you need toroduce from each row of your original table.
Here's an example:
WITH     cntr     AS
     SELECT     LEVEL     AS n
     FROM     dual
     CONNECT BY     LEVEL <= 3
SELECT     e.iduser
,     CASE  c.n
         WHEN  1  THEN  year1
         WHEN  2  THEN  year2
         WHEN  3  THEN  year3
     END     AS uear
FROM         cntr      c
CROSS JOIN  employee  e
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say what version of Oracle you're using (e.g. 11.2.0.2.0).
See the forum FAQ {message:id=9360002}
Edited by: Frank Kulash on Apr 11, 2013 6:47 AM