| 21. | Other types of constraints ( unique, primary key, and foreign key constraints ) are not inherited.
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| 22. | A table may have multiple foreign keys, and each foreign key can have a different parent table.
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| 23. | A table may have multiple foreign keys, and each foreign key can have a different parent table.
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| 24. | In particular, the natural join allows the combination of relations that are associated by a foreign key.
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| 25. | Is this extension, or inheritance, or neither ?-does the arrow imply a foreign key?
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| 26. | Typically, foreign key relationships will be exposed as an object instance of the appropriate type via a property.
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| 27. | At the same time, proper use of foreign keys can minimize data redundancy and chance of destructive anomalies.
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| 28. | You can set it up as a foreign key relationship if you decide to use indexes ( recommended ).
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| 29. | Finally, overlapping value sets possibly representing foreign key relationships between entities can be explored in an inter-table analysis.
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| 30. | The ISDN would be the primary key in the Book table and also a foreign key column in the BookCopy table.
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