Table for object's subtype in Database

Hi All,

We have got a table for types like WTPart, WTDocument etc.

However if I create a subtype of that WTPart like "DemoPart" and if we wish to have a table for that in the database. How to create it ? Should that be manually created ? Or by any other means ? Can you please let me know about it.

select * from WTPart;

select * from DemoPart; -- Is this possible ? Upon running this query it returns as table or view does not exist.

Can you please let me know something about this ?

Thanks and Regards,

Aditya Achanta