Chapter 11. Supporting Temporal Data in DB2 for z/OS
Ever since the first developers wrote the earliest programs and applications, there has been a need to store and access non-current data. Many types of data change over time, and different users and applications have requirements to access the data at different points in time. For some, the current, up-to-date values for the data are sufficient. But for others, accessing earlier versions of the data is needed.
When storing data in a traditional relational database system, various approaches historically have been used to store and access temporal data. Separate history tables are one approach (perhaps ...
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