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 station ( name VARCHAR, long VARCHAR, id VARCHAR )
TABLE: CREATE TABLE trip ( duration INTEGER, start_station_id VARCHAR )

### Question ###
For each station, return its longitude and the average duration of trips that started from the station.

### Accurate SQL ###

SELECT T1.name, T1.long, AVG(T2.duration) FROM station AS T1 JOIN trip AS T2 ON T1.id = T2.start_station_id GROUP BY T2.start_station_id