Oracle
1Z0-071 · Question #81
1Z0-071 Question #81: Real Exam Question with Answer & Explanation
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Question
Which two statements are true regarding constraints?
Options
- AA foreign key cannot contain null values.
- BA column with the unique constraint can contain null values.
- CA constraint is enforced only for the insert operation on a table.
- DA constraint can be disabled even if the constraint column contains data.
- EAll constraints can be defined at the column level as well as the table level.
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