When you create a table, you have the following primary index options:
| Option | Primary Index |
|---|---|
| Non-Unique Primary Index (NUPI) (Default) | One or more columns that may have duplicate values. |
| Unique Primary Index (UPI) | One or more columns with no duplicate values. |
| No Primary Index (NoPI) | None. Rows are not hashed based on any column values. |