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In Converting a One-To-One Binary Relationship in an E-R Diagram

question 36

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In converting a one-to-one binary relationship in an E-R diagram into two relational tables, the rule is that the unique identifier of the entity on the "many side" of the one-to-many relationship is placed as a foreign key in the table representing the entity on the "one side."


Definitions:

Non-substitutability

A characteristic of a resource or skill that cannot be easily replaced or duplicated by another.

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A system of economic accounts that provides a detailed statistical representation of a country's economic activities during a specific period.

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