Question : How to populate the table with quosi-random numbers

Have a table A(ID1  number(3), ID2 number(2));
How to populate table A with  a serial numbers. sequences can be used, but in A if there were only one ID, the following trick can be played:

insert into A(ID1)
( select rownum from dual CONNECT BY LEVEL < 1000);
It will insert 999 numbers into A.
Now ID2 can take the values from 1 to 99, how to deal this case with 2 variables?

Answer : How to populate the table with quosi-random numbers

select rownum, mod(rownum,99)+1 from dual CONNECT BY LEVEL < 1000