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    Create a History Table in Postgres with Joins


    Possibly my favorite data management trick is the history table. With history tables, we record all changes in two locations -- once in the primary table (as an update), and once in a history table (as an insert). With this handy trick, we save an audited record of all data, when it was live, and who changed it and when. Coupled with non-destructive deletes, you can explore the complete history of your data with joins.