USE tpch1;
select test 
from (
select 1 test
union all
select count(1) test from region
) checks
where test <> 0 order by 1;
test
1
5
select test
from (
select abs(r_regionkey) test from region
union all
select count(1) test from region
) checks
where test <> 0 order by 1;
test
1
2
3
4
5
select test
from (
select 1 test
union all
select r_regionkey from region
union
select count(1) test from region
) checks
where test <> 0 order by 1;
test
1
2
3
4
5