DMBS.ig
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Middleware systems in VDBMS facilitate coordinated queries and transactions across multiple DBMSs, providing a layer for seamless interaction between heterogeneous systems
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In peer-to-peer asynchronous replication, conflicts may arise if multiple master copies of an object are changed concurrently, potentially leading to inconsistencies
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Further optimization may involve using a hash table for the outer relation (R)
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In MySQL, you can only create databases using the command line interface.
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SORT MERGE JOIN can be optimized
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Table-level locks simplify management but can lead to higher concurrency.
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Fragmentation in distributed databases can be horizontal or vertical
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Lost updates occur when two transactions modify different data based on an initial read, potentially causing updates from one transaction to overwrite updates from another.
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In read committed isolation level, a transaction can potentially read data that has been modified by another transaction and subsequently rolled back.
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MySQL supports full outer joins natively in its SQL syntax.
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