text: autocommit off;
  create table aaa (a int);
  insert into aaa values(1);
  insert into aaa values(2);
  insert into aaa values(3);
  insert into aaa values(4);
  insert into aaa values(5);
  select * from aaa
  where
  rownum = 1 and
  a >= (select min(a) from aaa);
  select * from aaa
  where
  a >= (select min(a) from aaa) and
  rownum = 1; 
  rollback work;
  rollback;
  