Which of the following is the degenerate dimension?

Degenerate dimensions commonly occur when the fact table’s grain is a single transaction (or transaction line). Transaction control header numbers assigned by the operational business process are typically degenerate dimensions, such as order, ticket, credit card transaction, or check numbers.

What is degenerate and junk dimension?

Degenerate Dimension– A degenerate dimension is when the dimension attribute is stored as part of the fact table and not in a separate table. Junk Dimension– It is a single table with a combination of different and unrelated attributes to avoid having a large number of foreign keys in the fact table.

How do you create a degenerate dimension?

To create a degenerate dimension:

Right click on the dimensions folder and choose “New Dimension…”
In the Dimension Wizard, choose “Create the dimension using an existing table”
Select your fact as main table and set the others options according to your needs (key, name.)

What are dimensions types of dimensions?

Types of Dimensions are Conformed, Outrigger, Shrunken, Role-playing, Dimension to Dimension Table, Junk, Degenerate, Swappable and Step Dimensions.

What is degenerated dimension with example?

While this model accurately depicts the invoice transaction there are several issues with this model. The greatest among these issues would be that the invoice dimension can be almost as large as the invoice line fact table based on the average number of products purchased.

Why do we need degenerate dimensions?

Even though there is no corresponding dimension table of attributes, degenerate dimensions can be quite useful for grouping together related fact tables rows. For example, retail point-of-sale transaction numbers tie all the individual items purchased together into a single market basket.

Why do we use degenerate dimensions?

What is the use of degenerated dimension?

You can use the data in the degenerate dimension to limit or ‘slice and dice’ your fact table measures.” This common interpretation implies that it is good dimensional modeling practice to place dimension attributes in the fact table, as long as you call them a degenerate dimension.

What can you do with a degenerate dimension?

How are degenerate dimensions constructed in a fact table?

Degenerate dimensions, also called fact dimensions, are standard dimensions that are constructed from attribute columns in fact tables instead of from attribute columns in dimension tables. This is because useful dimensional data is sometimes stored in a fact table to reduce duplication, especially when you have a very large fact table.

How is a degenerate dimension defined in Oracle?

For example, the Oracle FAQ defines a degenerate dimension as a “data dimension that is stored in the fact table rather than a separate dimension table. This eliminates the need to join to a dimension table.

What are degenerate dimensions in a business process?

Transaction control header numbers assigned by the operational business process are typically degenerate dimensions, such as order, ticket, credit card transaction, or check numbers. These degenerate dimensions are natural keys of the “parents” of the line items.

Which of the following is the degenerate dimension?