If the child table contains generated keys from the parent table, the load process copies the appropriate primary key value from the parent table into the child table. For example, suppose you had the following data.

PARENT TABLE:

CHILD TABLE: has a relationship to the PARENTS PKEY_SRC_OBJECT

In this example, you can have a relationship pointing to the ROWID_OBJECT, to PKEY_SRC_OBJECT, or to a unique column for table lookup.