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 job_history ( job_id VARCHAR, end_date VARCHAR, start_date VARCHAR )

### Question ###
display job ID for those jobs that were done by two or more for more than 300 days.

### Accurate SQL ###

SELECT job_id FROM job_history WHERE end_date - start_date > 300 GROUP BY job_id HAVING COUNT(*) >= 2