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 Apartment_Bookings ( apt_id VARCHAR, booking_status_code VARCHAR )
TABLE: CREATE TABLE Apartments ( apt_id VARCHAR )

### Question ###
Show the average room count of the apartments that have booking status code 'Provisional'.

### Accurate SQL ###

SELECT AVG(room_count) FROM Apartment_Bookings AS T1 JOIN Apartments AS T2 ON T1.apt_id = T2.apt_id WHERE T1.booking_status_code = "Provisional"