There are several ways to minimize or even eliminate duplicate NUPI row checks while still preventing duplicate row from being inserted. This topic describes some of the ways to achieve that goal.
- Use a non-primary index column set to define a UNIQUE constraint or USI.
- Use multiple columns to define NUPIs in order to make the index as close to being unique as possible.
- Keep the number of NUPI duplicate rows for each value below 100.