Certain rules and guidelines apply when you perform data sampling on a single-table constraint.
Use the following rules and guidelines when you perform data sampling on a single-table constraint:
The sample percentage that you specify may differ from the actual sample percentage during a test run. The sample percentage that you specify represents the chance that each data is included in the sample.
You cannot use native sampling if the underlying Oracle tables or views from which you are sampling do not have unique primary keys. Instead, use PowerCenter sampling.
Some tests might have different results based on whether you enable data sampling.