Identify the Statement Below That Is False with Regards to Basic

question 29

Multiple Choice

Identify the statement below that is false with regards to basic requirements of a relational database model.

• A)Primary keys can be null.
• B)Foreign keys,if not null,must have values that correspond to the value of a primary key in another table.
• C)All non-key attributes in a table should describe a characteristic about the object identified by the primary key.
• D)Every column in a row must be single-valued.

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Definitions:

Atoms

The basic units of matter composed of a nucleus surrounded by electrons, representing the smallest component of an element that retains its chemical properties.

Compound

A substance formed by the chemical combination of two or more elements in fixed proportions.

Atomic Symbol

A notation of one or two letters representing a chemical element (e.g., H for hydrogen, O for oxygen) used in chemical equations and formulas.

Atomic Symbols

Abbreviations or short notations used to represent chemical elements (e.g., H for hydrogen, O for oxygen).