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Tera-Tom on Teradata Physical Implementation V12-V13 by Tera-Tom Coffing

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Chapter 2 – The Primary Index

“Speak in a moment of anger and you’ll deliver the greatest speech you’ll ever regret.”

– Anonymous

 

Every table in Teradata has one and only one Primary Index.

Teradata uses the Primary Index of each table to provide a row its destination to the proper AMP. This is why each table in Teradata is required to have a Primary Index. The biggest key to a great Teradata Database Design begins with choosing the correct column to be the Primary Index. The Primary Index columns value is the only thing that will determine on which AMP a row will reside. Because this concept is extremely important, let me state again that the Primary Index value for a row is the only thing that will determine on which AMP a row will reside. ...

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