Which statement is true about unique constraints?

Question

Options

• AThere can be only one unique constraint key per table
• BThere can be multiple unique constraints per table.
• CA foreign key can only reference a unique constraint.
• DA unique constraint is identical to a unique index.

• A
  5% (1)
• B
  77% (17)
• C
  14% (3)
• D
  5% (1)

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