Unknowns
uWhat
elements are involved?
ØExample:
The monthly summary table may not exist.
uWhat
to do with the elements you have?
ØExample: Do you need quarterly or yearly totals?
uHow
you should proceed?
ØExample: Is a hash join hint the best option?
uWhether
or not you can proceed?
ØDDL is still prevented in PL/SQL, isn’t it?
