We are running Oracle 9.2.0.4 Enterprise Edition. We want to implement running dbms_stats to get statistics, but I want to know the correct way to revert back to using analyze if we need to. Also, how can I verify queries using the statistics?

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The "analyze table" is obsolete (from Oracle 7), and Oracle recommends that you always use dbms_stats. Your can save and re-use statistics with the dbms_stats.export_schema_stats procedure. If statistics are in place, Oracle will use them unless you have optimizer_mode=rule.

This was first published in October 2004

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