Works in SQL Workshop, not in LOV Definition

Question

I developed a query
select distinct b.pointname display_value,a.pointnumber return_value
from e_sub08@scadahst_xajardb a, analogpoint@scadahst_xajardb b
where a.pointnumber = b.pointnumber
in SQL Workshop and I get the dataset that I need when I run it there. When I went to plug it into an LOV as a shared component in an application, I get the message "LOV query is invalid, a display and a return value are needed, the column names need to be different. If your query contains an in-line query, the first FROM clause in the SQL statement must not belong to the in-line query."
Why in one, but not the other? Any suggestions as to what I need to change?
Thanks!

Answer 1

Hi Kofi,
Many thanks for that, Kofi - I hadn't even noticed that that option was available!!!!
In order to set this up, you need to define the LOV through Shared Componets, Lists of Values rather than on the page item itself. (Note that there is a typo in the example code - depno should be DEPTNO :D )
I've just set up an example using this: [http://apex.oracle.com/pls/otn/f?p=34398:12] - pick any dept apart from the one shown at the top as being deptno = 10 and the second list is empty. Select the department that is deptno = 10 and you get the employees.
The LOV is defined as:
IF v('P12_DEPTNO') = '10' THEN
  RETURN
  'SELECT ename d, empno r '||
  'FROM emp '||
  'WHERE DEPTNO = 10 ORDER BY 1';
ELSE
  RETURN
  'SELECT ename d, empno r '||
  'FROM emp '||
  'WHERE DEPTNO = 1234 ORDER BY 1';
END IF;Therefore, you could have as many SELECT statements as you like provided all of them return a valid LOV recordset
Andy