I am new to Teradata and self-learning Teradata . The manuals says many things about UPI,USI,NUSI.
If a table has one PI,two or thre NUSI's , how is the data stored on AMP's? Is there any order of preference to consider PI and NUSI's of a table?
IF TD considers PI for distributing rows to AMP's, then what is the use of defining NUSI/USI on other columns if rows are already distributed based on PI?
Sorry for a dumb question.