FULL OUTER JOIN за обединяване на таблици с PostgreSQL

Вдъхновен от други отговори, но може би по-добре организиран:

SELECT *, 
       brcht + cana + font + nr AS total 
FROM   (SELECT insee, 
               annee, 
               SUM(Coalesce(brcht.nb, 0)) brcht, 
               SUM(Coalesce(cana.nb, 0))  cana, 
               SUM(Coalesce(font.nb, 0))  font, 
               SUM(Coalesce(nr.nb, 0))    nr 
        FROM   brcht 
               full outer join cana USING (insee, annee) 
               full outer join font USING (insee, annee) 
               full outer join nr USING (insee, annee) 
        GROUP  BY insee, 
                  annee) t 
ORDER  BY insee, 
          annee; 

Давам:

 insee  | annee | brcht | cana | font | nr | total 
--------+-------+-------+------+------+----+-------
 036223 |  2013 |     0 |    0 |    0 |  1 |     1
 036223 |  2014 |     0 |    0 |    0 |  1 |     1
 036223 |  2017 |     0 |    1 |    0 |  0 |     1
 086001 |  2013 |     0 |    0 |    0 |  1 |     1
 086001 |  2014 |     0 |    0 |    0 |  2 |     2
 086001 |  2015 |     0 |    0 |    0 |  4 |     4
 086001 |  2016 |     0 |    2 |    0 |  2 |     4
(7 rows)