{ "rows": [ { "task_id": "task_1_basic_antipatterns", "task_name": "Basic SQL Anti-pattern Detection", "difficulty": "easy", "before_score": 0.45, "after_score": 0.83, "delta": 0.38 }, { "task_id": "task_2_correlated_subqueries", "task_name": "N+1 Correlated Subquery Elimination", "difficulty": "medium", "before_score": 0.45, "after_score": 0.69, "delta": 0.24 }, { "task_id": "task_3_wildcard_scan", "task_name": "Wildcard LIKE & Projection Optimization", "difficulty": "medium-hard", "before_score": 0.45, "after_score": 0.69, "delta": 0.24 }, { "task_id": "task_4_implicit_join", "task_name": "Implicit Cross Join & Scalar Subquery Elimination", "difficulty": "hard", "before_score": 0.45, "after_score": 0.69, "delta": 0.24 }, { "task_id": "task_5_window_functions", "task_name": "Window Function & Full-Scan Audit", "difficulty": "expert", "before_score": 0.45, "after_score": 0.75, "delta": 0.3 } ] }