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"
### Context: 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? ### Answer: SELECT year_joined FROM table_name_63 WHERE enrollment < 438 AND ihsaa_class = "aa"