EXPLAIN ANALYZE
Interview Questions
- What is EXPLAIN?
- What is EXPLAIN ANALYZE?
- What's the difference between estimated cost and actual execution time?
- What does rows mean in an execution plan?
- What does loops mean?
- How do you identify a bottleneck in an execution plan?
- What does "Rows Removed by Filter" mean?
- How can you identify an inefficient Sequential Scan?
- How can EXPLAIN ANALYZE help you decide whether an index is needed?
- Walk me through how you would optimize a query using EXPLAIN ANALYZE.
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