select sum(case when no is null then 1 else 0 end) / Sum(1.00) as nullpercentage, sum(case when no is not null then 1 else 0 end) / Sum(1.00) as notnullpercentage from zzzzzz_csv as zc
select sum(case when no is null then 1 else 0 end) / Sum(1.00) as nullpercentage, sum(case when no is not null then 1 else 0 end) / Sum(1.00) as notnullpercentage from zzzzzz_csv as zc