Which two statements are true about foreign key constraints? (Choose two.)
A. The foreign key constraint columns must be supported by an index.
B. The foreign key constraint columns must be defined as NOT NULL.
C. The number and data types of foreign key constraint columns must match the parent key.
D. The columns of one foreign key constraint cannot be used in another foreign key constraint.
E. To define a foreign key constraint there must be an associated primary key or unique key in the same or different table.
|
Download Printable PDF. VALID exam to help you PASS. |
 |