Query Optimization
Interview Questions
- How do you approach optimizing a slow SQL query?
- Why can SELECT * be problematic?
- How can functions on columns affect index usage?
- How do you optimize a slow JOIN?
- How can ORDER BY make a query slow?
- How can you optimize large aggregations?
- When would you replace a subquery with a JOIN?
- What is the N+1 query problem?
- How do you optimize a query with millions of rows?
- Give an example of how you reduced query execution time.
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