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Teradata Load Utilities by Tom Coffing, Todd Wilson

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Chapter 4 - Temporary Tables

“To escape criticism – do nothing, say nothing, be nothing.”

– Elbert Hubbard

There are three types of Temporary Tables

Derived Table

• Exists only within a query

• Materialized by a SELECT Statement inside a query

• Space comes from the User's Spool space

• Deleted when the query ends

Volatile Table

• Created by the User and materialized with an INSERT/SELECT

• Space comes from the User's Spool space

• Table and Data are deleted only after a User Logs off the session

Global Temporary Table

• Table definition is created by a User and the table definition is permanent

• Materialized with an INSERT/SELECT

• Space comes from the User's TEMP Space

• When User logs off the session the data is deleted, but the table ...

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