Speed Oracle SQL with Temporary Tables

For certain types of SQL operations, the creation of intermediate result tables can result in stunning performance improvements. We will discuss how you can use the global temporary tables (GTT) syntax to improve the speed of queries that perform complex summarization activities, and how to speed up two-stage queries that perform both summarization and comparison activities.

Please read these important notes on SQL tuning with temporary tables:

- Tuning Oracle SQL with Global Temporary Tables

For the full details of the huge benefits of temporary table query tuning. see my book "Oracle Tuning: The Definitive Reference".

Letís begin by looking at how the creation of temporary tables can speed non-correlated subqueries against the Oracle data dictionary.

To read more on using temporary tables to Speed Oracle SQL:

http://dba-oracle.com/t_temporary_tables_sql.htm

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