Definition

A column is a specific piece of information associated with a data entity (real-world objects, concepts, or entities within a system). It represents a single data point or property.

For example:

• In a customer data entity, columns might include CustomerID, Name, Email, and Phone.
• In a product data entity, columns might include ProductID, Name, Price, and Category.

Purpose of Columns

1. Columns define the structure of data entities.
2. They determine what information can be stored and retrieved.
3. Columns are essential for querying, sorting, and filtering data.

Customization

In model-driven apps, you can customize columns by defining their data type, validation rules, and display format.

Columns can be added, modified, or removed based on the specific requirements of your application.

Columns (fields or attributes) play a vital role in defining the structure and properties of data entities within a model-driven development environment.