Q:

The entity integrity rule states that:

mhmadesk
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2022-07-14
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The entity integrity rule states that:

  1. no primary key attribute may be null.
  2. no primary key can be composite.
  3. no primary key may be unique.
  4. no primary key may be equal to a value in a foreign key.
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mhmadesk
2022-07-14
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(a).no primary key attribute may be null.

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