Which property of an entity can become a column in a table?

Indatabase design,attributesof an entity becomecolumnsin a relational table.

Example Usage:

For anEmployee entity, attributes might include:

CREATE TABLE Employees (

EmployeeID INT PRIMARY KEY,

Name VARCHAR(50),

Salary DECIMAL(10,2),

DepartmentID INT

);

Eachattribute(e.g., Name, Salary) becomes acolumnin the table.

Why Other Options Are Incorrect:

Option A (Modality) (Incorrect):Describesoptional vs. mandatoryrelationships, not table structure.

Option B (Uniqueness) (Incorrect):Ensuresdistinct valuesbutis not a column property.

Option D (Non-null values) (Incorrect):Ensures thatcolumns must contain databut doesnot define attributes.

Thus, the correct answer isAttribute, as attributes of entities becometable columns.