CREATE TABLE table_name_98 (erp_w INT, frequency_mhz VARCHAR)

Which ERP W has a Frequency MHz of 89.3 fm?
SELECT MAX(erp_w) FROM table_name_98 WHERE frequency_mhz = "89.3 fm"
SELECT MAX("erp_w") FROM "table_name_98" WHERE "89.3 fm" = "frequency_mhz"