Temporal tables are provided by some database engines to handle versioning. Unfortunately, there is no such thing as out-of-the-box versioning in PostgreSQL. So, if you are moving from Db2 or Oracle, there's some work ahead of you to port the desired functionality to PostgreSQL. Basically, changing the code a bit on the PostgreSQL side isn't too hard. However, it does need some manual intervention—it isn't a straight copy-and-paste job anymore.