How can we split a select query to 3 or 4 if it is fetching much records?

Question

I am running a query like:
select * from table_name
it will be fetching 152940696 records. Now i want to fetch this result as 3 or 4 select statements. That is, in the second query I want to fetch the records from where i stopped in the first query. and similar for the 3rd i have to continue from the 2nd query. And for the 4th query i have to start from where i have stopped in the 3rd query.
when i tried with rownum we can fetch the records upto < or <= to a particular count like 100000000. But above this count i cannot fetch using rownum. Because > or >= wont work with rownum.
Is there anyother way to split the select query as i explained.
Thanks in advance

Answer 1

I'll assume you want to split the query up for performance reasons.
The easiest way to do this if you have the license is to use the parallel query option, which can help, hurt or do nothing. The only way to find out is to try. PQO would be best from a performance standpoint if possible, provided it will do what you need.
Failing that as has been suggested you need a logical, scalable way to divide up the queries. It has already been pointed out that the rownum solution probably will not work correctly. Also, the MINUS with ROWNUM idea has the disadvantage of having to read a lot of the same data twice, making the query run longer.
Perhaps a range would provide a way to split up the data - something like
select whatever
  from table
where primary_key < 10000000;
select whatever
  from table
where primary key between 10000001 and 199999999;
...