What was the highest round that had northwestern?
CREATE TABLE table_name_18 (round INTEGER, school VARCHAR)
SELECT MAX(round) FROM table_name_18 WHERE school = "northwestern"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_18 (round INTEGER, school VARCHAR) Question: What was the highest round that had northwestern? [/INST] SELECT MAX(round) FROM table_name_18 WHERE school = "northwestern" </s>