CREATE TABLE table_name_27 (erp_w INT, frequency_mhz VARCHAR)

What is the least ERP W when the freguency MHz is 89.3 fm?
SELECT MIN(erp_w) FROM table_name_27 WHERE frequency_mhz = "89.3 fm"
SELECT MIN("erp_w") FROM "table_name_27" WHERE "89.3 fm" = "frequency_mhz"