Call sign ใดมีความถี่ 102.5 fm ไม่จำเป็นต้องใช้ทุกตาราง
Which Call sign has a Frequency of 102.5 fm?It is not neccessary to use all the tables.
 table_name_26:  (call_sign [ VARCHAR ] frequency [ VARCHAR) ]
SELECT call_sign FROM table_name_26 WHERE frequency = "102.5 fm"