Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_31 (format VARCHAR, frequency VARCHAR)

### Question ###
Say the frequency of 1290 khz

### Accurate SQL ###

SELECT format FROM table_name_31 WHERE frequency = "1290 khz"