Which of the following constraints can be defined only at the column level (on a single column)
and not at the table level (on multiple columns)?
A.
PRIMARY KEY
B.
FOREIGN KEY
C.
CHECK
D.
NOT NULL
E.
UNIQUE
Which of the following constraints can be defined only at the column level (on a single column) and not at the table level (on multiple columns)?
Which of the following constraints can be defined only at the column level (on a single column)
and not at the table level (on multiple columns)?