Column
(Created page with "A '''column''' typically refers to a '''field''' or '''attribute''' associated with a '''data entity'''. '''Data Entities''' In model-driven development, data entities represent real-world objects, concepts, or entities within a system. Examples of data entities include '''tables''', '''classes''', or '''database records'''. '''Columns (Fields/Attributes)''' A '''column''' is a specific piece of information associated with a data entity. It represents a single dat...") |
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==== Definition ==== | |||
A '''column''' is a specific piece of information associated with a data entity in a database. It represents a single data point or property and is usually equivalent to an [[Documentation:Attribute|attribute]]. When creating a [[Documentation:Class|class]], it's [[Documentation:Attribute|attributes]] become columns in a database table. | |||
A '''column''' is a specific piece of information associated with a data entity. | |||
It represents a single data point or property. | |||
For example: | For example: | ||
In a '''customer''' data entity, columns might include | * 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. | |||
In a '''product''' data entity, columns might include | |||
In model-driven apps, you can customize columns by defining their data type, validation rules, and display format. | ==== Customization ==== | ||
In model-driven apps, you can customize columns (attributes) 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 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. | Columns (fields or attributes) play a vital role in defining the structure and properties of data entities within a model-driven development environment. | ||
Latest revision as of 06:28, 20 January 2025
This page was created by Stephanie@mdriven.net on 2024-05-17. Last edited by Edgar on 2025-01-20.
Definition
A column is a specific piece of information associated with a data entity in a database. It represents a single data point or property and is usually equivalent to an attribute. When creating a class, it's attributes become columns in a database table.
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.
Customization
In model-driven apps, you can customize columns (attributes) 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.