I'm working on this problem in SQL Developer. I'm not sure how to correct my worksheet input to resolve the error messages. Could someone explain how to fix this?

Worksheet:

CREATE TABLE ORDERITEMS ( Order_numb NUMBER(4), Item_numb NUMBER(2), ISBN VARCHAR2(10), Quantity NUMBER(3) NOT NULL, PaidEach NUMBER(5,2) NOT NULL, CONSTRAINT orderitems_pk PRIMARY KEY (order_numb, item_numb), CONSTRAINT orderitems_order_numb_fk FOREIGN KEY (order_numb) REFERENCES orders (order_numb) , CONSTRAINT orderitems_isbn_fk FOREIGN KEY (isbn) REFERENCES books (isbn) , CONSTRAINT oderitems_quantity_ck CHECK (quantity > 0) ); INSERT INTO ORDERITEMS VALUES (1000,1,'3437212490',1,19.95); INSERT INTO ORDERITEMS VALUES (1001,1,'9247381001',1,31.95);

Script Output:

Error starting at line : 1 in command - CREATE TABLE ORDERITEMS ( Order_numb NUMBER(4), Item_numb NUMBER(2), ISBN VARCHAR2(10), Quantity NUMBER(3) NOT NULL, PaidEach NUMBER(5,2) NOT NULL, CONSTRAINT orderitems_pk PRIMARY KEY (order_numb, item_numb), CONSTRAINT orderitems_order_numb_fk FOREIGN KEY (order_numb) REFERENCES orders (order_numb) , CONSTRAINT orderitems_isbn_fk FOREIGN KEY (isbn) REFERENCES books (isbn) , CONSTRAINT oderitems_quantity_ck CHECK (quantity > 0) ) Error report - ORA-00904: "ORDER_NUMB": invalid identifier 00904. 00000 - "%s: invalid identifier" *Cause: *Action:

Error starting at line : 14 in command - INSERT INTO ORDERITEMS VALUES (1000,1,'3437212490',1,19.95)