CREATE TABLE table_name_24 (on_air_id VARCHAR2, frequency VARCHAR2, purpose VARCHAR2)

What is the On-air ID with the frequency of 105.9, and purpose of commercial?
SELECT on_air_id FROM table_name_24 WHERE frequency = "105.9" AND purpose = "commercial"
SELECT "on_air_id" FROM "table_name_24" WHERE "105.9" = "frequency" AND "commercial" = "purpose"