CREATE TABLE table_34046 ("Callsign" TEXT, "Area served" TEXT, "Frequency" TEXT, "Band" TEXT, "On-air ID" TEXT, "Purpose" TEXT)

what Area has the frequency of 100.3 and an On-air ID of yass fm?
SELECT "Area served" FROM table_34046 WHERE "Frequency" = '100.3' AND "On-air ID" = 'yass fm'
SELECT "Area served" FROM "table_34046" WHERE "Frequency" = '100.3' AND "On-air ID" = 'yass fm'