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 gas_station ( LOCATION VARCHAR, open_year VARCHAR )

### Question ###
order all gas station locations by the opening year.

### Accurate SQL ###

SELECT LOCATION FROM gas_station ORDER BY open_year