Oracle
1Z0-071 · Question #61
1Z0-071 Question #61: Real Exam Question with Answer & Explanation
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Question
Which two statements are true regarding constraints? (Choose two.)
Options
- AA constraint is enforced only for an INSERT operation on a table.
- BA foreign key cannot contain NULL values.
- CThe column with a UNIQUE constraint can store NULLS.
- DYou can have more than one column in a table as part of a primary key.
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