If a DEFAULT Constraint Is Included When a New Column

question 78

Multiple Choice

If a DEFAULT constraint is included when a new column is added to a table,the default value is applied to ________.

• A)all existing rows at the time the column is added
• B)all new rows
• C)all new rows but only after the UPDATE command is issued
• D)Both A and B are correct

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Definitions:

Case Studies

In-depth analyses or investigations of particular instances or examples, often used to illustrate a specific point or to explore a phenomenon in detail.

External Validity

The extent to which the results of a study can be generalized or applied to other settings, populations, or times.

Internal Validity

The extent to which a study is able to produce evidence that its results are caused by the variables it is testing, free from external influence.

Correlational Method

A statistical technique used to determine the degree to which two variables are related without inferring a cause-and-effect relationship.