>If the # of rows you want to delete is much larger than the # of rows being retained, you might want to do this....
>
>- Copy the rows you want to retain to another table
>- TRUNCATE the original table
>- Load the table you created in step 1 back to the original table (or rename it, or whatever)
>
>Obviously, if you have constraints involved, you'll need to disable or drop them and then re-enable-re-add them

No constraints involved. When you mention truncate, what option are you referring to exactly?

As far as the recommended turning off the transaction, this is not possible. We can go with a simple recovery mode however but that doesn't help much.