If global data is so bad, why doesn’t that apply to databases (being technically just global data)

If global data is viewed as being so bad, with its potential for change anywhere in the system – then isn’t the database due the same complaint?

The database being just a big persistent global data store right?

Answer

A database is just global data if you have global database accessors, which is wrong.

Technically a database is a data store to persist application data, that is, to preserve it between executions of the same code (as opposed to in-memory data). The data in the database is not meant to be accessible to every part of the code, but just to specific parts.

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