Apex 4.2: any workarounds for group by alias?

Question

Hello
I have six db fields containing numbers 1-10. I need to select these fields into one "column" to drive a chart which requires SQL in the format:
select link, name, value from tableI've come up with a union statement that returns the fields into one "column" but this uses an alias and I am unable to group by the alias. I am also unable to group by column number. My table cannot sensibly be restructured, i.e. putting columns as rows.
I figure the thing to do is to create a view (would i then be able to group by a view column?). Am I right and can anyone suggest the right sort of syntax?
My UNION statement looks like this:
Select null link, 'Q1' label, col1 question
from table
union all
Select null link, 'Q2' label, col2 question
from table
union all
Select null link, 'Q3' label, col3 question
from table
union all
Select null link, 'Q4' label, col4 question
from table
union all
Select null link, 'Q5' label, col5 question
from table
union all
Select null link, 'Q6' label, col6 question
from tableThanks
Emma

Answer 1

If you are on 11g this looks like an UNPIVOT.
Not sure if this is what you want:
WITH mydata AS
   SELECT  9 col1, 8 col2, 7 col3, 6 col4, 5 col5, 4 col6 FROM DUAL
SELECT 'X' link, label, question
  FROM mydata
UNPIVOT ( question FOR label IN( col1 as 'Q1'
                                , col2 as 'Q2'
                                , col3 as 'Q3'
                                , col4 as 'Q4'
                                , col5 as 'Q5'
                                , col6 as 'Q6'
LINK LABEL   QUESTION
X    Q1             9
X    Q2             8
X    Q3             7
X    Q4             6
X    Q5             5
X    Q6             4Please read SQL and PL/SQL FAQ
Always Oracle version, sample data (CREATE TABLE and INSERT staments), logic and expected output.
When you put some code or output please enclose it between two lines starting with {noformat}{noformat}
i.e.:
{noformat}{noformat}
SELECT ...
{noformat}{noformat}
It's also considered a good practice to mark questions as answered when the answers are satisfying your question or provide additional details.
Regards.
Al
Edited by: Alberto Faenza on May 1, 2013 5:13 PM