select 'alter table '||table_name||' allocate extent(size 64k);'
from tabs t
where not exists (select segment_name from user_segments s where s.segment_name=t.table_name);
select 'alter table '||table_name||' allocate extent(size 64k);'
from tabs t
where not exists (select segment_name from user_segments s where s.segment_name=t.table_name);