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wrote...
Posts: 179
4 months ago
When changing the minimum cardinality on the parent side of the relationship from zero to one, the foreign key ________.

• must be changed from NULL to NOT NULL

• must be changed from NOT NULL to NULL

• must be changed to a composite key

• must be changed to a surrogate key
Source  Download
Database Processing: Fundamentals, Design, and Implementation
Edition: 15th
Authors:
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Posts: 219
4 months ago
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must be changed from NULL to NOT NULL
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4 months ago
Thanks
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