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Default column values in JPA can be set both while creating an entity and in the schema definition.
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Replication in distributed databases can improve query processing speed
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The "HAVING" clause is used to filter rows returned by a query based on aggregate functions.
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Enhanced conflict detection can automatically combine simultaneous text insertions in collaborative editing scenarios.
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Transactions are a collection of successive DB operations that change a database from one consistent state to another consistent state.
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Database management are systems that support data encryption
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Distributed concurrency control ensures global serializability in a distributed database
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Unrepeatable reads can lead to inconsistencies and unpredictable results in applications that rely on stable data for the duration of the transaction.
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In external merge sort I/O, most files are not sorted in 4 phases.
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PostgreSQL supports both SQL and NoSQL functionalities
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