When You Specify Referential Integrity,you Need to Decide How to Handle

question 21

Essay

When you specify referential integrity,you need to decide how to handle the update of the primary key.What decisions do you need to make?

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Definitions:

Weighted Average

An average resulting from the multiplication of each component by a factor reflecting its importance.

Z-score

A numerical metric indicating how a particular value compares to the average of a dataset, expressed by the number of standard deviations it lies from the mean.

P-value

The likelihood of encountering experimental results that are at least as significant as the actually observed results, given the null hypothesis is assumed to be accurate.

Pooled Variance

A method used in statistics to combine variances from two or more groups to estimate a common variance when they are assumed to be equal.