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The 'SERIALIZABLE' isolation level guarantees that transactions will always execute in the order they are received
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In multilevel databases, users with security level U can see tuples of class U
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A relational database does not use structured query language (SQL) for database access.
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If all attributes needed for SELECT, WHERE, and GROUP BY clauses are present in the index key, scanning through the index is not necessary
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MySQL supports stored procedures.
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On a DBMS level, a transaction represents a series of data processing commands (read, modify, add, delete).
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Runs created in the previous phase are progressively merged into larger runs.
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Lost updates occur when two transactions modify the same data based on an initial read, potentially causing updates from one transaction to overwrite updates from another.
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In external merge sort I/O, longer runs mean fewer phases.
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SORT MERGE JOIN is not a method for implementing joins
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