It is possible to do a autonumber sequence in a SELECT on Oracle?

Question

I need to do a task in Oracle that I don't know how can I possible do this.

Ok, I need to do a SELECT when I define a autonumber sequence on-the-fly.

For example:

Select autonumber(1, 9000) as auto from some_table

And the result would be

auto
------
1
2
3
4
5
6
7
8
9
10
...
9000

This would be possible to do? Are there any oracle build in function that will help me doing this?

Answer 1

If you want a sequence of numbers independent of rows in an actual table, rather than numbering the returned rows (in which case look at rownum or row_number()), you can do:

select level as auto
from dual
connect by level <= 9000;

Answer 2

You can use Oracle's built in rownum

select rownum as auto, other1, other2 from some_table

For ANSI compliance, you can use ROW_NUMBER() for later versions of Oracle