--- title: DrivingKeyLink_HK description: The Default Term named DrivingKeyLink_HK  contains the Hask Key of the Business Keys that define the Driving Key of a Driving Key Link. The DrivingKeyLink_HK  is a binary(20). It contains the Hask Key --- [Skip to content](https://knowledge.bigenius-x.com/drivingkeylink_hk#main-content) [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new?hsLang=en) [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal?hsLang=en) [![TRI\_Logo\_biGENIUS\_2020\_RGB\_s](https://knowledge.bigenius-x.com/hs-fs/hubfs/Marketing/TRI_Logo_biGENIUS_2020_RGB_s.png?width=150&height=42&name=TRI_Logo_biGENIUS_2020_RGB_s.png)](https://www.bigenius-x.com/) Open main navigation Close main navigation - [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new) - [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal) How can we help you? - There are no suggestions because the search field is empty. 1. 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Example for a Driving Key Link with the Terms named *FK\_MD\_Employee\_Hub\_HK* ``` HASHBYTES('SHA1', ISNULL(CAST([FK_MD_Employee_Hub_ID] AS NVARCHAR(4000)), '_NULL_') + '_' + ISNULL(CAST([FK_MD_Company_Hub_ID] AS NVARCHAR(4000)), '_NULL_')) AS [DrivingKeyLink_HK] ``` Example of values: ![](https://knowledge.bigenius-x.com/hs-fs/hubfs/image-png-Jan-08-2024-03-25-42-7819-PM.png?width=337&height=63&name=image-png-Jan-08-2024-03-25-42-7819-PM.png)   - [Getting started](https://knowledge.bigenius-x.com/getting-started?hsLang=en#main-content) - [Guidelines](https://knowledge.bigenius-x.com/getting-started?hsLang=en#guidelines) - [Start working](https://knowledge.bigenius-x.com/getting-started?hsLang=en#start-working) - [Account](https://knowledge.bigenius-x.com/getting-started?hsLang=en#account) - [General overview](https://knowledge.bigenius-x.com/general-overview?hsLang=en) - [Artificial Intelligence](https://knowledge.bigenius-x.com/artificial-intelligence?hsLang=en) - [Application Modules](https://knowledge.bigenius-x.com/application-modules?hsLang=en#main-content) - 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