I've found that multiple simple statements often work faster then convoluted single statements. Ivan Sergio Borgonovo wrote:
Is there a place that gives examples of all the kind of queries postgresql support? Sometimes I think if there is a way to obtain a result in just one statement without writing a function and it would be nice to have a panoramic of all the strategies I could try for single statements. The SQL reference http://www.postgresql.org/docs/8.1/interactive/sql-commands.html isn't inspirational every time Even if it is not exactly what I'm looking for a sort of "one liner" as the one you find for perl, sed, awk... As an example of things the kind of things I'm looking for: update system set weight=subselect._avg from ( select round(avg(weight)) as _avg from system where type='module' ) as subselect where name='users_commerce'; thx
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