PostgreSQL - ERROR: column does not exist SQL state: 42703 - sql

Question

I am trying to do a cohort analysis and compare average number of rentals based on the renter's first rental year(= the year where a renter rented first time). Basically, I am asking the question: are we retaining renters whose first year renting was 2013 than renters whose first year was 2015?
Here is my code:
SELECT renter_id,
Min(Date_part('year', created_at)) AS first_rental_year,
( Count(trip_finish) ) AS number_of_trips
FROM bookings
WHERE state IN ( 'approved', 'aboard', 'ashore', 'concluded', 'disputed' )
AND first_rental_year = 2013
GROUP BY 1
ORDER BY 1;
The error message I get is:
ERROR: column "first_rental_year" does not exist
LINE 6: ... 'aboard', 'ashore', 'concluded', 'disputed') AND first_rent...
^
********** Error **********
ERROR: column "first_rental_year" does not exist
SQL state: 42703
Character: 208
Any help is much appreciated.

Answer 1

SELECT renter_id,
Count(trip_finish) AS number_of_trips
FROM (
SELECT renter_id,
trip_finish,
Min(Date_part('year', created_at)) AS first_rental_year
FROM bookings
WHERE state IN ( 'approved', 'aboard', 'ashore', 'concluded', 'disputed' )
) T
WHERE first_rental_year = 2013
GROUP BY renter_id
ORDER BY renter_id ;

Answer 2

ERROR:
SQL Error [42703]: ERROR: column XYZ does not exist
Check you have double quotes around Column Fields:
BAD:
update public."AppTime" t Set "CustomTask"= 'XYZ' where t.SharedAppId = 12890;
GOOD:
With double quotes around "SharedAppId"
update public."AppTime" t Set "CustomTask"= 'XYZ' where t."SharedAppId" = 12890;
If you created the table without quotes, you should not use quotes when querying it, and vice versa. This is explained in the manual: "If you want to write portable applications you are advised to always quote a particular name or never quote it"