--- title: DVPIT_ForeignKey_Identity description: "DVPIT_ForeignKey_Identity is the reference from a PIT row to one of its satellites: the key of the satellite version valid at that point in time." --- [Skip to content](https://knowledge.bigenius-x.com/dvpit_foreignkey_identity#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. [biGENIUS-X Knowledge Base](https://knowledge.bigenius-x.com/?hsLang=en) 2. [Generators](https://knowledge.bigenius-x.com/generators?hsLang=en) 3. [Default Terms](https://knowledge.bigenius-x.com/generators?hsLang=en#default-terms) # DVPIT\_ForeignKey\_Identity **Applies to** Platform: Microsoft SQL Server · Snowflake · Snowflake dbt · Databricks · Databricks dbt · Fabric Lakehouse · Fabric Warehouse · Oracle Architecture: Data Vault `DVPIT_ForeignKey_Identity` is the reference from a PIT row to one of its satellites: the key of the satellite version valid at that point in time. Together with [DVPIT\_ForeignKey\_LoadDate](https://knowledge.bigenius-x.com/dvpit_foreignkey_loaddate?hsLang=en) it lets a query join the PIT to exactly one satellite version. ### Objects that carry it PIT and Business PIT. The term is created for each relationship from the PIT to a satellite, not when the PIT itself is created. Its name in the example below is `load_customer_sat_CUSTOMER_HK`, for the satellite `load_customer_sat` and the role `CUSTOMER`. ### Value The PIT Source view joins each satellite on the PIT key and takes the latest satellite version whose `BG_ValidFromTimestamp` is not later than the point in time of the PIT row. The term holds the `Hub_HK` or `Link_HK` of that version, so it equals [PIT\_HK](https://knowledge.bigenius-x.com/pit_hk?hsLang=en) when a version exists. When the satellite has no version yet at that point, the term holds the unknown-member key of zero bytes. The PIT table has an index on this term and the matching `DVPIT_ForeignKey_LoadDate` for each satellite. ### Data type | Platform | Type | | --- | --- | | Microsoft SQL Server | `binary(20)` | | Fabric Warehouse | `varbinary(20)` | | Oracle | `RAW(20)` | | Snowflake, Snowflake dbt | `BINARY(32)` | | Databricks, Databricks dbt, Fabric Lakehouse | `binary` | The data type must match the length of the selected [Hash Algorithm](https://knowledge.bigenius-x.com/hash-algorithm-project?hsLang=en). ### Example A PIT on Microsoft SQL Server has the satellites `load_customer_sat` (role `CUSTOMER`) and `load_caching_hashing` (role `CUSTOMER_Hashing`). Customer 941 has a new customer type at 11:00 and an unchanged address. Both PIT rows reference the satellite key of customer 941 (hash values shortened): ``` PIT_HK BG_ValidFromTimestamp load_customer_sat_CUSTOMER_HK 0xD2CD1706... 2026-10-27 10:00 0xD2CD1706... 0xD2CD1706... 2026-10-27 11:00 0xD2CD1706... ``` ### Release differences - Generator 2.4: Snowflake uses SHA2-256 with `BINARY(32)` by default. Up to Generator 2.3 the default was `HASH` with a numeric type, see [Generators Release - 2.4.0](https://knowledge.bigenius-x.com/generators-release-2.4.0?hsLang=en). - Generator 2.2: Databricks and Fabric Lakehouse store hash values as `binary`. Up to Generator 2.0 they were `string`. ### Related articles - Reference: [PIT\_HK](https://knowledge.bigenius-x.com/pit_hk?hsLang=en), [DVPIT\_ForeignKey\_LoadDate](https://knowledge.bigenius-x.com/dvpit_foreignkey_loaddate?hsLang=en), [Hub\_HK](https://knowledge.bigenius-x.com/hub_hk?hsLang=en), [Hash Algorithm (Project)](https://knowledge.bigenius-x.com/hash-algorithm-project?hsLang=en) - See also: [PIT](https://knowledge.bigenius-x.com/pit?hsLang=en), [Business PIT](https://knowledge.bigenius-x.com/business-pit?hsLang=en) - [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) - 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