Which clause is used to filter groups in PostgreSQL?
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What does COALESCE function do?
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Which operator is used for pattern matching in PostgreSQL?
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What is the purpose of CASE statement?
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Which function converts string to uppercase?
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What does the OFFSET clause do?
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Which data type stores date and time with timezone?
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What is the purpose of BEGIN and COMMIT?
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Which command shows database size?
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What is PostgreSQL autovacuum?
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Which parameter controls PostgreSQL log level?
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What is the purpose of checkpoint_segments?
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Which view shows table and index sizes?
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What does effective_cache_size parameter represent?
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Explain PostgreSQL replication types and their use cases.
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