The figure shows representations of the PurchaseOrder_objtab
and Customer_objtab
object tables. A line representing a reference connects the attribute Cust_ref
of the Customer_objtab
table to the PurchaseOrder_objtab
table.
The figure is a graphical representation of the CREATE
TABLE
PurchaseOrder_objtab
statement and the description of the PurchaseOrder_objtyp
type that precede the figure in the text. The figure is also a graphical representation of the CREATE
TABLE
Customer_objtab
statement (also shown in Figure A-3).