Bi de facto and dimension table definitions

A typical example is the logical business compared to cubes, product dimensions, time dimensions, position dimensions, respectively, as different axes. The intersection of axes is a detailed fact. This fact table is a table of intersection points of multiple dimensions. A dimension table is a form of factual analysis.

First, the star structure in the database structure is introduced, which maintains the data in a single fact table in the center of the structure, and other dimension data is stored in the dimension table. Each dimension table is directly related to the fact table and is usually joined to the fact table by a key.

A star schema is a schema that is more flow-oriented to a data warehouse.

A fact table is a central table in a data warehouse structure that includes numeric measures and keys that relate facts to dimension tables. The fact table includes data describing specific events within the narrative business (such as product sales).

A dimension table is a collection of dimension attributes. is a form that analyzes the problem.

Observing the specific angle of the data is a class of properties to consider when the problem is collected by the attributes of the dimensions.

Bi de facto and dimension table definitions