AWS Athena Query Performance

Module 1: Performance Fundamentals

• 1. Optimizing Athena Query Performance Toggle Complete

  Objective: Apply first-line query tuning techniques.

• 2. Working with Partitioned Data Toggle Complete
• 3. Troubleshooting Performance with Large Datasets Toggle Complete

Module 2: Query Reliability

• 4. Troubleshooting Common Query ErrorsToggle Complete
• 5. Handling Schema Changes in Athena TablesToggle Complete
• 6. Resolving Connectivity Issues with Data SourcesToggle Complete

Try It Snippet

-- Validate partition filters to reduce bytes scanned
SELECT region, COUNT(*) AS events
FROM analytics.events
WHERE event_date BETWEEN DATE '2025-01-01' AND DATE '2025-01-07'
  AND region IN ('us-east-1', 'us-west-2')
GROUP BY region;