Using a Bind Variable in the FROM part of a SQL Statement?

Hello Everyone,
I have a problem, I am trying to run an SQL statement. However I need the FROM part of the SQL statement to be a bind variable. This is because the end user will need to select between 2 database views.
I have tried this:
select CON_ID from :P23_DB_NAME where CON_LEGACY_ID=:P23_CONLEG_NO
I had no luck. The error i got was,
"+Query cannot be parsed within the Builder. If you believe your query is
syntactically correct, check the ''generic columns'' checkbox below the
region source to proceed without parsing.
ORA-00903: invalid table name+"
Which makes sence, but now I am a bit stuck.
Does anyone have any ideas as to get around this problem?
Thanks in Advance.
-N.S.N.O.

The example I gave you is quite simple. You need to take some time to study it to see where you need be carefull what you put where. Now, your example of course doesn't work becaues you have several errors. This will work for you:
DECLARE
   x   VARCHAR2 (4000);
BEGIN
   x := x || 'SELECT CON_ID FROM ';
   x := x || :p23_db_name;
   x := x || ' WHERE CON_LEGACY_ID = ' || :p23_conleg_no;
   RETURN (x);
END;Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

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In the first query below - I use two bind variables to collect the start and end date.
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