Athena
15 questionsPartition projection, CTAS, Iceberg tables, cost optimization, and federated queries.
Partition Projection for Zero-Maintenance Partitions
Your Athena table has thousands of date-based partitions. Running MSCK REPAIR TABLE takes 20 minutes and sometimes times out. How do you fix this?
CTAS for Materialized Results
You have a complex Athena query that joins 5 tables and is run by 20 analysts daily. Each execution scans 500 GB and costs $2.50. How would you optimize this?
Athena Engine Version 3
Your team is migrating from Athena v2 to v3. What are the key improvements and what might break?
Apache Iceberg Tables in Athena
You're building a data lakehouse on S3 and need ACID transactions, time travel, and efficient upserts. How would you use Iceberg with Athena?
Query Result Reuse
Multiple analysts run the same Athena query throughout the day. Each execution scans and charges for the full dataset. How can you avoid redundant scans?
Workgroups for Cost and Access Control
Your organization has 5 teams using Athena, and last month the bill was $15,000 — but nobody knows which team spent how much. How do you gain visibility and control?
Federated Queries with Athena
Your analytics team needs to join data across S3, RDS PostgreSQL, and DynamoDB in a single query. How would you achieve this with Athena?
Athena Cost Optimization Strategies
Your team's Athena costs have grown to $8,000/month. Walk me through a systematic approach to reducing this by 60%.
SerDe Configuration for Complex Data
You need to query nested JSON logs in S3 via Athena. The JSON has arrays, nested objects, and some records span multiple lines. How do you set up the table?
Glue Catalog Integration with Athena
How does Athena use the AWS Glue Data Catalog, and what happens when your data schema changes?
Athena Prepared Statements and Parameterized Queries
Your application sends user input directly into Athena queries via string concatenation. Your security team flagged this as an injection risk. How do you fix it?
Optimizing Athena for Iceberg Tables
You've migrated a large table to Iceberg format in Athena. Queries are slower than expected. Walk me through your optimization approach.
Athena Views vs Materialized Approaches
A colleague suggests creating Athena views to 'save money on repeated queries.' Is this correct? What are the alternatives?
Athena Performance Tuning Deep Dive
An Athena query joining a 2 TB fact table with a 50 GB dimension table takes 45 minutes. Walk me through your optimization process.
Athena + Step Functions Pipeline
You need to orchestrate a multi-step Athena pipeline: validate raw data, transform it with CTAS, run quality checks, and notify on failure. How would you design this?