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Static data is data that does not change after being recorded. It is a fixed data set. Experts contrast static data with dynamic data, where dynamic data may change after it is recorded, and has to be continually updated.
The fundamental difference between static and dynamic data necessitates different kinds of system design. For instance, a project that requires inputting various geographic latitudes and longitudes would never need to be updated. It can be safely stored away without tools for changing it. A customer list, on the other hand, or any other type of dynamic data set needs updating and handling tools. Data handling philosophies like ACID (atomicity, consistency, isolation, durability) are applied to systems, to make dynamic data updates consistent and available throughout a system. Experts would say that problem-solving for dynamic data is much more immediate and complex than problem-solving for static data sets.