Re: Postgres 9 : - How to interpret the EXPLAIN query results

Hi,
everything you need to know is available on the documentation at
http://www.postgresql.org/docs/current/static/sql-explain.html.

*"COSTS*

*Include information on the estimated startup and total cost of each plan
node, as well as the estimated number of rows and the estimated width of
each row. This parameter defaults to TRUE."*
Best regards,Anthony

On Wed, Mar 25, 2015 at 9:00 AM, Khangelani Gama <kgama(at)argility(dot)com> wrote:

> Hi
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> Please help, how can I interpret the following results of my EXPLAIN query
> ?, I can see that the query will through 18586018 rows, but what’s the
> meaning of cost and width?
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> GroupAggregate (cost=762381141.96..768375132.77 rows=18586018 width=32)
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