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Teradata Basics for Business Users by Tom Coffing, Leona Coffing

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Chapter 13 - Temporary Tables

“Those who would give up essential liberty to purchase a little temporary safety, deserve neither liberty nor safety.”

-Benjamin Franklin

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 ...

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