task_id: D5_query_optimize
domain: data
network: false
time_limit_sec: 1200
seeds: [0, 1, 2]
difficulty: hard
languages: [python, sql]
tags: [sql, query-optimization, indexes, n-plus-1, aggregation, sqlite, performance]
workspace_file_count: 4
lines_changed_expected: 50
parameterized: true
tni_patterns: [A, C]