testsAndMisc/python_pkg/sql_drills/fixtures/10_window_topn/DOCS-task.md
Krzysztof kuhy Rudnicki ee78ae44cc
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Add sql_drills MySQL exact-match harness
Docker mysql:8.0.33 container, judge-style output grading, 12 original drills with live-verified references kept in tests only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WzxdWZewj4WS5X6AZyjWDp
2026-11-01 21:13:18 +01:00

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Top-N per group with DENSE_RANK

Show employees whose salary is among the two highest DISTINCT salaries in their department (ties share a rank, so more than two people can appear).

Output columns (no header): dept, name, salary, the dense rank.

  • Order by dept, then rank, then name ascending.
  • RANK() would skip numbers after ties; this drill wants DENSE_RANK().