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Determining a query's response time

How do we determine a query's performance (response time)? Can you please tell me the steps?

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The easiest way to determine how long a query takes to run is to execute the query in SQL*Plus with timing turned on. Before running the query, issue the following:
SET TIMING ON
Now execute the query. You will be presented with the results as well as the runtime of the query.

This was first published in March 2006

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