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Dirty Write is a type of concurrency issue.
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A primary key can contain null values
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In B+ trees, if the tree is clustered, then it is efficient.
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The optimizer can choose the best buffer page replacement strategy based on the specific operation being performed
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Commit-transaction indicates the successful completion of a transaction, confirming that all changes made are permanent in the database.
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The system catalog consists of a set of system-defined tables that store metadata about database objects
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In practice, the costs for sort-merge join, as well as for external sorting, are linear
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DIFFERENT is an integrity constraint.
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MySQL does not use the SQL language for querying databases.
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Deadlocks occur when transactions are waiting on each other to release locks, preventing progress.
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