Attributkolumn

Attributkolumn is a term used to describe a column in a table or dataset that stores the value of a specific property (attribute) of an entity or record. In a typical relational database, an entity type such as Person or Product is modeled with a set of columns, where each column represents an attribute, such as name, birthdate, color. The attributkolumn holds the value of that attribute for each row. The column has a data type appropriate to the attribute, such as VARCHAR for names, DATE for birth dates, or INT for quantities. Column constraints (NOT NULL, UNIQUE, CHECK) help enforce data quality and business rules. An attribute column is usually named after the attribute and may be indexed to speed queries that filter or sort by that attribute.

In some data models, particularly when attributes are sparse or highly dynamic, an entity-attribute-value (EAV) model is used. In EAV, attributes are not stored as fixed columns but as rows in a separate attribute store; this uses the attribute concept differently and can complicate queries.

Example: In a Products table, Color and Size are attributkolumns that store each product’s color and size. In a raw dataset, a column named "Weight" is an attributkolumn that records product weight.

Design considerations include ease of querying, schema evolution, normalization, and performance. The term may appear in Dutch, Norwegian, or Swedish contexts to refer to such columns.