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Awwwards Class Sandbox

Select. Query.
Scale Databases.

Write efficient window partition queries, analyze slow search plans with EXPLAIN ANALYZE, and secure B-tree index layouts.

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10 Modules Course Syllabus

Interactive Landing Sandboxes

Select a topic below to inspect the curriculum lessons and practice code playground templates.

sql module

SQL Query Master

Optimize database schemas, indexes, and aggregation trees under runtime loads.

  • Author clean partition/row aggregations using SQL window statements.
  • Optimize slow operations by tracing query parser steps with EXPLAIN ANALYZE.
  • Construct composite B-Tree indexes, covering indexes, and partition parameters.
playgrounds/sandbox.ts
Active Playground
-- Partitioned Analytics Window Query
SELECT 
  employee_id, 
  department, 
  salary,
  RANK() OVER (
    PARTITION BY department 
    ORDER BY salary DESC
  ) as salary_rank
FROM employees
WHERE status = 'active';