This section explains the conventions used when building the Snowflake database and functionality for implementing various features such as history tracking and support for ETL.
Each table includes ETL_MODIFIED_DATETIME column which records the date and time the entity was last updated.
History is tracked in the USERS table using Slowly Changing Dimension (SCD) type 2.0 with the VALID_FROM_DATETIME and VALID_TO_DATETIME columns. The VALID_TO_DATETIME is NULL for data that is currently valid. Historical data is available from August 2022. Contact us If you need earlier data.
This is a list of conventions used when designing the database:
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The schema is in 3rd normal form. Some data may be denormalized for query ergonomics.
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Table names are plural and snake_case.
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Column names are SNAKE_CASE.
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Id columns are suffixed with _id and are of varchar type and should be treated as such regardless of their content.
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Date and time column names are suffixed with _datetime and are of type TIMESTAMP_TZ which includes UTC offset.
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