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TeradataMaddy 1 post Joined 03/13
11 Mar 2013
Storing of rows on AMPS based on UPI,NUSI,USI

Hi, 
   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. 
Thanks
  

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