I need to fix the SQL error. The issue is that I tried to use UNION ALL to combine results for multiple columns, but DuckDB's parser rejected the syntax. Let me query each categorical column separately or use a different approach. First, let me check what categorical columns we have and then query them properly. ```json { "action": "tool_call", "reasoning": "The previous query failed due to UNION ALL syntax. I'll query the most common values for Sex first, then do separate queries for other categorical columns (Pclass, Survived, Embarked, Cabin, Parch). Starting with Sex as it's a key classifier.", "tool": "query_sql", "args": { "sql": "SELECT Sex, COUNT(*) as frequency, ROUND(100.0 * COUNT(*) / (SELECT COUNT(*) FROM raw.titanic), 1) as percentage FROM raw.titanic WHERE Sex IS NOT NULL GROUP BY Sex ORDER BY frequency DESC", "purpose": "Get distribution of Sex values" } } ```