So There You Have The Basics (And Then Some) Of What Makes Up A Raw Data Vault Data Model And You Have Seen Some Of The Innovations From Data Vault 2.0.
Links can be considered the glue that holds the data vault model together. Primary key (src_pk)¶
a primary key (or surrogate key) whi…
foreign keys (src_fk)¶
foreign keys referencing the primar… The design is flexible, scalable, consistent and adaptable to the needs of.
This Contains Information About The Status Of Link_A_B.
Now a sales txn's that involves all the above business objects should be modeled as a link table. This includes the implementation of advanced data vault objects like transaction links, non historized links and bridge tables. The datavault builder is automating every aspect of your data warehouse.
Create Non Historized Links For Data That Can’t Be Modified In The Source System
3.0 hubs, links, and satellites the data vault model consists of three basic entity types: The data vault model should represent the lowest possible grain of source data. But because a data vault schema typically contains a high number of tables, a lot of joins are required to select data from all the hubs, links and satellites that are involved in each query.
Always Noted As An Exception Structure, A Transactional Link Is Actually Not A Link.
It declares that there is a relationship between a and b, but nothing about when or for how long. The data vault design is focused around the functional areas of business with the hub representing the primary key. Links = associations / transactions
An Important Rule In Data Vault Is That No Foreign Keys Should Be Present In Hubs.
Links stores the intersection of business keys (hubs). Additional infos for filling scd2 dimensions are in this question/answer: The mapping between the data vault (both raw data vault and business data vault) to information marts is a complex procedure.