What is time-variant data

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Reference no: EM131529060

Question: 1. When implementing a 1:1 relationship, where should you place the foreign key if one side is mandatory and one side is optional? Should the foreign key be mandatory or optional?

2. What is time-variant data, and how would you deal with such data from a database design point of view?

3. What is the most common design trap, and how does it occur?

Reference no: EM131529060

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