1z0-061 Exam Dumps | Which two statements are true regarding constraints?

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Question 126/200

Which two statements are true regarding constraints?

A. A foreign key cannot contain null values.

B. A column with the unique constraint can contain null values.

C. A constraint is enforced only for the insert operation on a table.

D. A constraint can be disabled even if the constraint column contains data.

E. All constraints can be defined at the column level as well as the table level.

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