I need to check for duplicate rows in the Olympic table tennis medals dataset. Let me query for exact duplicates first by grouping on all meaningful columns. ```json { "action": "tool_call", "reasoning": "To find duplicate rows, I'll group by all meaningful columns (excluding metadata columns like _ingestion_timestamp, _batch_id, _source_file, _source_system which are ingestion artifacts) and count occurrences. Any group with COUNT(*) > 1 represents duplicate rows.", "tool": "query_sql", "args": { "sql": "SELECT year, event, medal, country, medalist, is_china, medal_value, event_type, gender, era, COUNT(*) as duplicate_count FROM raw.olympic_table_tennis_medals_1988_2024 GROUP BY year, event, medal, country, medalist, is_china, medal_value, event_type, gender, era HAVING COUNT(*) > 1 ORDER BY duplicate_count DESC", "purpose": "Find exact duplicate rows by grouping on all meaningful columns and identifying groups with more than one occurrence" } } ```