Data in TT vs Oracle DB

Hi,
I believe it was already answered in here but need the confirmation.
So I have dynamic read only cachegroup in TT where I put specific columns from SCOTT.EMP table where name starts with 'E%'.
1. Is that correct that even playing with the PASSTROUGH numbers I will not be able to do select * from EMP from application as it will give me data only from TT and will not even go to Oracle DB to get the rest.
Is that correct?
If yes, then the only option would be to load full table into TT but what are the benefits in that case as I would have to duplicate all the data from Oracle DB to TT.
2. Is that correct that I will not be able to run the following query
select * from SCOTT.EMP (tt), SCOTT.DEPT (OraDB)
where SCOTT.EMP.DEPT_ID=SCOTT.DEPT.DEPT_ID
Basically if I have select statement from two tables and one of the tables exists in TT then the second one also MUST exist in TT database as otherwise select statement would fail. Is that correct?

+>> Is that correct that even playing with the PASSTROUGH numbers I will not be able to do select * from EMP from application as it will give me data only from TT and will not even go to Oracle DB to get the rest. Is that correct?+
No. For example, with passthrough set to 3 the whole SQL statement will be passthru' and executed on Oracle, and the results will be returned to your applicatiion.
Since you are using a DYNAMIC cache group, if you add an equaility WHERE clause on the PK of SCOTT.EMP in your query, i.e. WHERE EMPNO = 7499 then this row will be loaded from Oracle, and the data will be inserted into TimesTen. The dynamic load feature is not related to passthrough settings.
+>>Basically if I have select statement from two tables and one of the tables exists in TT then the second one also MUST exist in TT database as otherwise select statement would fail. Is that correct?+
No. Passthrough will help in this case also. Try setting it to 1. If all the columns and tables referenced in the SQL are in TimesTen, then it will execute in TimesTen else the whole SQL will execute in Oracle.
Simon

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Thanks Justin.
I get what you are saying,i really wanted to see the output of the codes, because the furtherst i could get from that code is
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