The Join Operation

question 76

Multiple Choice

The join operation

• A) combines relational tables to provide the user with more information than is otherwise available.
• B) identifies the table from which the columns will be selected.
• C) creates a subset consisting of columns in a table.
• D) organizes elements into segments.

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Definitions:

Aryl Diisocyanate

Organic compounds containing two isocyanate groups (-N=C=O) attached to an aromatic ring, used in the production of polyurethanes.

Ethylene Glycol

A colorless, odorless, sweet-tasting organic compound used as antifreeze in cooling and heating systems.

Polyesters

A category of polymers that contain the ester functional group in their main chain, widely used in fibers and plastics.

Diester

A diester is an organic compound formed when two hydroxyl groups in an acid are replaced by ester groups.