Evaluate the following statements:
CREATE TABLE purchase_orders
(pojd NUMBER(4),
po_date TIMESTAMP,
supplie_id NUMBER(6),
po_total NUMBER(8,2),
CONSTRAINT order_pk PRIMARY KEY(po_id))
PARTITION BY RANGE(po_date)
(PARTITION Q1 VALUES LESS THAN (TO_DATE(?1-apr-2007?d-mon-yyyy?),
PARTITION Q2 VALUES LESS THAN (TO_DATE(?1-jul-2007?d-mon-yyyy?),
PARTITION Q3 VALUES LESS THAN (TO_DATE(?1-oct-2007?d-mon-yyyy?),
PARTITION Q4 VALUES LESS THAN (TO_DATE(?1-jan-2008?d-mon-yyyy?));
CREATE TABLE purchase_order_items
(po_id NUMBER(4) NOT NULL, product_id NUMBER(6) NOT NULL,
unit_price NUMBER(8,2),
quantity NUMBER(8),
CONSTRAINT po_items_fk
FOREIGN KEY (po_id) REFERENCES purchase_orders(po_id))
PARTITION BY REFERENCE(po_items_fk);
What are the two consequences of the above statements? (Choose two.)