Since the data inventory is in the performance barrier, when the table is connected to the table, especially with EJB, everyone likes to establish a table directly in the CMP. For example, there are two tables, the primary key of the table is the foreign key of the B table, if A, B is not established in the database, can this relationship can be established in the CMP? When building CMP in JB, you can build a RELATIONSHIP, you should be able to build CMR and tables with the overseas key. Just learn EJB, you laugh in prawn.
