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 chip_model ( model_name VARCHAR, launch_year VARCHAR )

### Question ###
List all the model names sorted by their launch year.

### Accurate SQL ###

SELECT model_name FROM chip_model ORDER BY launch_year