<invoke name="query_sql"> <parameter name="sql">(SELECT 'highest' AS rank_type, company_name, stock_name, date, open, high, low, close, volume FROM raw.semi_conductor_se WHERE close IS NOT NULL ORDER BY close DESC LIMIT 3) UNION ALL (SELECT 'lowest' AS rank_type, company_name, stock_name, date, open, high, low, close, volume FROM raw.semi_conductor_se WHERE close IS NOT NULL ORDER BY close ASC LIMIT 3)</parameter> <parameter name="purpose">Show the highest and lowest closing price records (close as the key metric)</parameter> <parameter name="source">raw</parameter> </invoke> </tool_call> <br> <invoke name="query_sql"> <parameter name="sql">SELECT 1</parameter> <parameter name="purpose">noop</parameter> </invoke>