Where the Global Temporary Table created in Oracle

Global Temporary Table definition is created in default tablespace (Not in Temporary Tablespace) attached to specific schema.

Actually Global Temporary Table gets created in default tablespace attached to specific schema and during runtime data been stored in Temporary Tablespace attached to specific schema/user.

Because the data in a temporary table is, by definition, temporary, backup and recovery of temporary table data is not available in the event of a system failure.

To prepare for such a failure, you should develop alternative methods for preserving temporary table data.

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