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 status (id VARCHAR, station_id VARCHAR, lat INTEGER, bikes_available INTEGER)
TABLE: CREATE TABLE station (id VARCHAR, station_id VARCHAR, lat INTEGER, bikes_available INTEGER)

### Question ###
What are the ids of stations that have latitude above 37.4 and never had bike availability below 7?

### Accurate SQL ###

SELECT id FROM station WHERE lat > 37.4 EXCEPT SELECT station_id FROM status GROUP BY station_id HAVING MIN(bikes_available) < 7