Examine the two pieces of SQL code below
CREATE TABLE orders(
ord_no NUMBER(2) CONSTRAINT ord_pk PRIMARY KEY,
ord_date DATE,
cust_id NUMBER(4));
CREATE TABLE ord_items
(ord_no NUMBER (2),
Item_no NUMBER(3),
qty NUMBER(3) CHECK (qty BETWEEN 100 AND 200),
expiry_date CHECK (expiry_date > SYSDATE),
CONSTRAINT its_pky PRIMARY KEY(ord_no, item_no),
CONSTRAINT ord_fky FOREIGN KEY(ord_no)REFERENCES orders(order_no)
);