Version History of Base Table Rows in the Dalarna Dataset Collection

The 'History' table is an integral part of the 'Dalarna' dataset collection. It maintains the version history of its base table rows, ensuring that changes over time can be tracked and analyzed. This unique feature is facilitated by two key columns that record the dates when a row was extracted from the data source and when a new version of the same row was added. This offers a comprehensive view of the row's lifecycle, with the latest version being identifiable by a null value in the column recording the date of the next version's extraction.

The table also includes a column that serves as a unique identifier for each row in conjunction with the extraction date. This approach ensures that each version of a row is distinct and identifiable. Furthermore, the table contains geographical data transformed from the shapefile format, a common choice for storing geographical location and attribute information. This information can be represented by points, lines, or polygons, making it versatile for various types of geographic features.

The data for this table is sourced from the website of 'Lantmäteriet' (The Land Survey) in Sweden. This ensures that the table benefits from the precision and reliability associated with one of the most reputable institutions in the country.

In terms of data analytics, this table offers a wealth of opportunities. For instance, the version history can be utilized to track changes in geographical features over time, enabling analysts to understand trends and patterns. Additionally, the geographical data can be used in spatial analysis, allowing for the exploration of relationships and correlations between different geographical features. Lastly, the extraction dates can provide insights into the frequency of changes, which can be crucial for predictive modeling and forecasting.