![]() This table type grows horizontally and has hierarchical relationships. This table type is known as de-normalized tables. The various columns of the dimension-type table are basically attributes of dimension table. ![]() There is no limit set for a given number of dimensions. Dimension-type table is interconnected to fact-type table by the use of keys. ![]() It is a combination of dimensions and the value of attributes. They are known as degenerated dimensions.Ī dimension-type table consists of the dimensions along which the measurement is taken, in fact-type table. Degenerated dimension: These measure types of dimensions of the fact table are the ones which are non-additive measures or which cannot be added.Semi-additive measures store basic unit of measurement of business process. Semi-additive measures are the ones which are added to some dimensions and not all dimensions. Fully additive measures are the ones added to all dimensions. Additive measures: Attribute format of fact table can be fully additive or semi-additive.As such, there is no need to store such data as it does not convey any information. This data has no unit of measurement because it does not indicate any quantity. Sparse data: There is some data in a fact-type table which has a null measure or it measures to zero.The more the data grain the better the fact-type table. Data grain must be performed at the highest level. Data grain indicates the depth of information stored in the fact table. Data grain: Fact table consists of data in textual format as well as numbers.This key is unique and identifies a row in the fact table. Keys: Fact table consists of concatenation of all primary keys of the dimension table.Accumulated Fact Table: The activities of the process with a beginning and end are represented by the accumulated fact table.Snapshot Fact Table: It contains many non-additive and semi-additive facts and is mostly used to describe and analyze the state of things at a particular time.It is usually used to represent an event which occurs at primary level. Transaction Fact Table: It is a basic approach to the business process. ![]() ![]() The fact table is also known as the reality table. It usually consists of metrics of business process. It consists of data in de-normalized form, the lowest possible form. The first column consists of foreign keys that will help connect the data with the dimension-type table, while the second column consists of descriptive attributes and the data to be analyzed. There are two key columns in a fact table. It has data in numeric form, the data that needs to be analyzed. It is a primary table in dimensional model. What is a Fact Table?Ī fact table type has values of attributes in the dimension table. In the process of gathering data, a dimension table is created before the fact table. However, the data in the fact table can comprise numbers along with text as well. Both the tables consist of data in textual format. In a system, a fact table consists of facts of the system as it's content data, whereas a dimension table comprises of the content of the fact table, which in turn helps build a connection between the respective fact table and the dimension table. ![]()
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