What are the different ways to create EO

1. Using Tables
2. Using Views, but view should be updatable. Views can inherently updatable or you can create INSTEAD OF trigger on view to make it updatable.
3. Overriding doDML method
4. Synonyms: Its an alias for any table or materialized view
5. Materialized view: Its a database object which contains the results of a query

Note: If primary key is not inferred then framework will create an attribute RowId with primary flag checked