DatabaseHackerRank
Learning Notes
SQL (Advanced)
Demonstrated advanced SQL problem-solving for analytics, optimization, and complex relational data scenarios.
Window functionsQuery optimizationData modeling
What I Learned
- Write efficient queries using joins, window functions, and subquery strategies.
- Model reporting logic directly in SQL for data-heavy application features.
- Optimize query structure for performance on larger datasets.
How I Applied This
- Reduced query latency by restructuring joins and filtering earlier in the execution plan.
- Built reusable SQL patterns for KPI dashboards and operational reports.
- Improved reporting consistency with cleaner schema relationships.
Learning Diagram
Advanced SQL Learning Diagram
This flow captures my approach to turning raw relational data into accurate and fast analytical outputs.
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