Examlex
Which of the following is not a criterion for selection of a primary key?
A. The primary key cannot be NULL (blank)
B. The primary key should be controlled by the organization assigning it
C. Primary keys with sequential values make it easier to spot gaps in the data
D. Longer key values are better than shorter key values
Wave Forms
Graphical representations of electrical signals, showing the variation of voltage or current over time.
Polarity
Refers to the orientation of magnetic or electrical poles, indicating the direction of magnetic or electrical fields.
Molten
Describes a substance that has been heated past its melting point and is in a liquid state, typically referring to metals or glass.
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