ORA-00904 on join - sql

Question

I am trying to create the following view:
CREATE OR REPLACE VIEW AlbumDistribution AS
SELECT Album.Album_ID,
Album.title,
HasTrack.tracked,
FinishedTrack.released_title,
SUBSTR(Album.Album_ID, -1) is_distributed_as
FROM Album A
JOIN HasTrack HT
ON HT.Album_ID = A.Album_ID
JOIN FinishedTrack FT
ON HasTrack.OriginatesFrom = FT.OriginatesFrom
AND HasTrack.tracked = FT.version;
but I get the ORA-00904 error:
ERROR at line 6:
ORA-00904: "HASTRACK"."TRACKED": invalid identifier
Which I find very confusing, as I reference HasTrack.tracked before and there's no error. If I change the order of the statements, putting HasTrack.OriginatesFrom = FT.OriginatesFrom last then I get the same error but for HasTrack.OriginatesFrom.

Answer 1

You define an alias for this and other tables. You need to use the alias throughout the query:
CREATE OR REPLACE VIEW AlbumDistribution AS
SELECT A.Album_ID, A.title, HT.tracked,
FT.released_title, SUBSTR(A.Album_ID, -1) is_distributed_as
FROM Album A JOIN
HasTrack HT
ON HT.Album_ID = A.Album_ID JOIN
FinishedTrack FT
ON HT.OriginatesFrom = FT.OriginatesFrom AND
HT.tracked = FT.version;