What are the two types of time, and how are they different? Why does it make sense to have both types of time associated with a tuple?
Answer to relevant QuestionsWill functional dependencies be preserved if a relation is converted to a temporal relation by adding a time attribute? How is the problem handled in a temporal database?Give a recursive procedure to efficiently compute the spatial join of two relations with R-tree indices. Give an example to show that the version-vector scheme does not ensure serializabilityExplain why it may be impractical to require serializability for long-duration transactions.Consider the data in Exercise 15-1. Use the normal approximation for the sign test to test H0: = 70 versus H0: 7.0. What is the P-value for this test?
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