What was the highest SaffirSimpson with an NHC advisory of 18?
CREATE TABLE table_name_8 (saffir_simpson_category INTEGER, nhc_advisory_number VARCHAR)
SELECT MAX(saffir_simpson_category) FROM table_name_8 WHERE nhc_advisory_number = "18"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_8 (saffir_simpson_category INTEGER, nhc_advisory_number VARCHAR) Question: What was the highest SaffirSimpson with an NHC advisory of 18? [/INST] SELECT MAX(saffir_simpson_category) FROM table_name_8 WHERE nhc_advisory_number = "18" </s>