A Primary Key That Consists of More Than One Attribute

question 47

Multiple Choice

A primary key that consists of more than one attribute is called a:

• A) foreign key.
• B) composite key.
• C) multivalued key.
• D) cardinal key.

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Definitions:

Shale

A fine-grained sedimentary rock composed of mud that splits easily into layers, often used in the production of oil and natural gas.

Sandstone

A sedimentary rock consisting of sand-sized minerals or rock grains, compacted and often cemented together over time.

Limestone

A sedimentary rock composed primarily of calcium carbonate, often formed from marine organisms' shells and skeletons.

Granite

A rough-textured igneous rock that predominantly contains quartz, feldspar, and mica, frequently used in the construction industry.