one more try with model, available 10gR1
select * from (select extract(year from hiredate) h, count(*) c from emp group by extract(year from hiredate)) model dimension by (h) measures (c) rules( c[FOR h FROM 1980 to 1990 INCREMENT 1] = case when c[CV()] is present then c[CV()] else 0 end) order by h; H C ---------- ---------- 1980 1 1981 10 1982 1 1983 0 1984 0 1985 0 1986 0 1987 2 1988 0 1989 0 1990 0