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In our ongoing Data Vault Friday series, our trainer Marc Finger delves into an intriguing question posed by the audience.

“In Hubs, we add two ghost records: one with 0s (unknown/zero key) and another with f’s (sometimes called error key). In the loading of the stage, in which cases should we replace the generated hash key with the error key instead, and how? Right now, if the Business Key (BK) or combination of BKs is null, we are always replacing it with the zero key. My question is in which cases should we use the ffff key instead.”

In this informative video, Marc explores the usage and value of zero keys when loading links within the Data Vault framework. The question prompts a discussion on the considerations and scenarios where replacing the generated hash key with the error key, represented by ‘ffff,’ is beneficial.

The video provides practical insights and recommendations for optimizing the handling of ghost records and error keys, contributing to a more robust and efficient Data Vault implementation.

Meet the Speaker

Picture of Marc Finger

Marc Finger

Marc is working in Business Intelligence and Enterprise Data Warehousing (EDW) with a focus on Data Vault 2.0 implementation and coaching. Since 2016 he is active in consulting and implementation of Data Vault 2.0 solutions with industry leaders in manufacturing, energy supply and facility management sector. In 2020 he became a Data Vault 2.0 Instructor for Scalefree.

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