What is the quickest way to create a fact table?
To create a Fact table, right click the ‘Fact Tables’ folder (or one of its sub folders) and select Create New. There are two ways to create a Fact Table. By far the quickest way is to import the Meta Data from a Source System, and then edit as required.
What is factless fact table example?
A factless fact table is a fact table that does not have any measures. It is essentially an intersection of dimensions (it contains nothing but dimensional keys). For example, you can have a factless fact table to capture student attendance, creating a row each time a student attends a class.
Which table is loaded first dimension or fact?
The process of loading the base schema requires that fact tables and dimension tables be loaded. Fact tables bear foreign keys to the dimension tables and are therefore dependent entities. This would suggest that dimension tables be loaded first.
Can fact table have duplicates?
If that is not the case and there are in fact duplicates in the Source, depending on the situation the code can either produce a run-time error or can load duplicate rows into the Base fact table.
Is there such a thing as a factless fact table?
By definition, the factless fact table is a fact table that does not contain any facts. There are two kinds of factless fact tables: Factless fact table describes event or activity.
How is a fact table related to a dimension table?
Although, you should keep in mind that it means your fact table will have more data rows. Every fact table will be related to one or more dimensions in the model. These dimension tables are tables that their surrogate key (or primary key) is part of the fact table.
Which is the best way to build a fact table?
If you build your fact table from the lowest grain (the most detailed list of dimensions), you always get the ability to expand easily in the future. Although, you should keep in mind that it means your fact table will have more data rows. Every fact table will be related to one or more dimensions in the model.
Why is the fact table called the star schema?
The relationship between the fact table and dimension tables around it forms the shape of a Star. That is why this model is called the Star Schema. The Fact table is in the center and dimensions around it. Star Schema is one of the most important concepts of a data model for reporting.