At Splice, product growth analysis often relies on large event tables such as app activity, subscription changes, and engagement logs. On massive datasets, a correct SQL query can still be unusable if it scans too much data or joins inefficiently.
Explain how you would optimize a SQL query that is running too slowly on a massive PostgreSQL dataset. In your answer, cover:
The interviewer is looking for a practical, structured explanation rather than generic advice. Focus on PostgreSQL-specific reasoning, trade-offs, and the kinds of query patterns a Product Growth Analyst might use on Splice event and subscription data.