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After optimization, the cost for SORT MERGE JOIN is (M+N)
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Asynchronous replication in distributed databases allows for delayed consistency
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MySQL Workbench does not allow for database migrations from different database systems like SQL Server and Oracle.
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In distributed database systems, communication costs are typically lower than in centralized systems
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The log file records all operations of a transaction to enable the reversal of its effects.
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Access control regulates who may access which resources in a system and how.
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Shared locks prevent any transaction from writing to the resource while the lock is held.
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Read locks prevent other transactions from writing to the same data but allow concurrent reads.
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PostgreSQL does not allow users to create custom data types
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Views in SQL are used to create virtual representations of data in one or more tables, providing simplified abstraction, security, query reuse, and performance optimization.
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