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Exam 1z0-082 topic 1 question 176 discussion

Actual exam question from Oracle's 1z0-082
Question #: 176
Topic #: 1
[All 1z0-082 Questions]

Which two statements are true about constraints? (Choose two.)

  • A. A UNIQUE constraint can use a pre-existing index on the constrained column or columns
  • B. A FOREIGN KEY column can contain NULLs.
  • C. A PRIMARY KEY constraint can only be added to an empty table.
  • D. A column can have only one CHECK constraint.
  • E. A CHECK constraint can refer to values in other rows.
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Suggested Answer: AB 🗳️
by cf1f99b at Nov. 15, 2024, 8:39 p.m.

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cf1f99b
1 month, 3 weeks ago
Selected Answer: AB
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