What is the greatest number of valves?
CREATE TABLE table_21021796_1 (valves INTEGER)
SELECT MIN(valves) FROM table_21021796_1
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21021796_1 (valves INTEGER) Question: What is the greatest number of valves? [/INST] SELECT MIN(valves) FROM table_21021796_1 </s>