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EntityManager's find() method is used to perform a select query in JPA.
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Completed transactions are always: Normal or Abnormal.
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Distributed databases can offer higher availability compared to centralized databases due to redundancy
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Let T1, T2, ..., Tn be transactions. Then a sequence of operations of transactions T1, T2, ..., Tn will be called an execution plan only if: all operations are only of the types read, write, create, update, and the relative order of operations is preserved.
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Distributed data independence, also known as transparency, requires users to have precise knowledge of the physical location of the data in a distributed database system
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Access rights determine for each user which objects they can access and in which way
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A "dirty write" is a situation where a transaction tries to modify the same value at the same time as another transaction, and one of the modifications is lost.
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The "SELECT" statement is used to retrieve data from a database.
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