explain workload

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To: pgsql-performance group <pgsql-performance@xxxxxxxxxxxxxx>
Subject: explain workload
From: Radhya sahal <rad_cs_2006@xxxxxxxxx>
Date: Fri, 21 Oct 2011 18:11:41 -0700 (PDT)

Hi there,,
How can use explain to estimate workload contains more than one query in the same time.
such as
explain (q1,q2,q3)......i want the total cost for all queries in the workload using one explain ,,??
regards..

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