> How do you add/delete those records in
> table1 to sync it to table2?

Easily. This case is not affected by cursor instability curse because
both streams are sorted and records are inserted/deleted/updated in
"current" position, so they cannot be read "afterwards". ;)
BTW, remember me, please, what normal form is broken by two tables in
the same DB, consisting the same data?..

SY, SD.