What year joined had an enrollment less than 438 and an AA as the IHSAA Class?
CREATE TABLE table_name_63 (year_joined VARCHAR, enrollment VARCHAR, ihsaa_class VARCHAR)
SELECT year_joined FROM table_name_63 WHERE enrollment < 438 AND ihsaa_class = "aa"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_63 (year_joined VARCHAR, enrollment VARCHAR, ihsaa_class VARCHAR) Question: What year joined had an enrollment less than 438 and an AA as the IHSAA Class? [/INST] SELECT year_joined FROM table_name_63 WHERE enrollment < 438 AND ihsaa_class = "aa" </s>