FULD YDRE JOIN for at flette tabeller med PostgreSQL

Inspireret af andre svar, men måske bedre organiseret:

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; 
 

Giver: