Problem in running sql query

Hello ,
I am using oracle 10g apex 3.2.
I have assosiated 2 schema "vpmys and vp" with one workspace.
In the application , i created a new page of report ,which is assosiated with one schema called "vp" and i wish to run this query
select * from vpmys.t_devotees
minus
select * from vp.t_devotees
Same database dmp is installed in both schema except that the no of rows may be more or less in one database.So first i need to know the added rows and what are they and then insert the same no of rows into another db.
But this doesnt run in the application.
But it runs in the SQL Command window.
So what way i should change the query so that it runs.
Thanks
Swapna

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Oracle Application Express (APEX)

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