How to delete many rows in a big table, but not all the rows ( truncate table can't be used in this case )

Hi All,

I want to delete many rows in a big table, but not all the rows ( truncate table can't be used in this case )

This table have to continue to be updated during operation ( because it's used by application).

That's means I can't move all data in a new table to truncate the table, then insert only data which are necessary.

So, is it possible to delete many rows in a big table without log ?

Options from database are :

select into/bulkcopy/pllsort, trunc log on chkpt, abort tran on log fullSybase version : 15.7 SMP SP101

Thanks in adavance

Regards,

Claude