PostgreSQL - Performance TuningWhich of the following is the correct way to get a detailed query plan with actual run times in PostgreSQL?AEXPLAIN SELECT * FROM employees;BEXPLAIN ANALYZE SELECT * FROM employees;CANALYZE EXPLAIN SELECT * FROM employees;DEXPLAIN RUN SELECT * FROM employees;Check Answer
Step-by-Step SolutionSolution:Step 1: Recall syntax for detailed EXPLAINEXPLAIN ANALYZE runs the query and shows actual times.Step 2: Check other options for correctnessEXPLAIN alone shows plan only; ANALYZE EXPLAIN and EXPLAIN RUN are invalid.Final Answer:EXPLAIN ANALYZE SELECT * FROM employees; -> Option BQuick Check:EXPLAIN ANALYZE = Detailed plan with timings [OK]Quick Trick: Use EXPLAIN ANALYZE for real execution times [OK]Common Mistakes:Using EXPLAIN without ANALYZE for timingsSwapping ANALYZE and EXPLAIN keywordsUsing non-existent EXPLAIN RUN command
Master "Performance Tuning" in PostgreSQL9 interactive learning modes - each teaches the same concept differentlyLearnWhyDeepVisualTryChallengeProjectRecallTime
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