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Sean Davis |
at Mar 26, 2007 at 7:16 pm
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On Monday 26 March 2007 14:39, henlin wrote:
hi.
Is were any way to make aggregates work faster? Like some kind of indexes?
as for example "SELECT a,sum(b) FROM c GROUP BY a;"
The only thing come to my mind is tmp tables && triggers && some kind of
functions (not sure, which and how).
You could certainly put a trigger on table c that inserts or updates values in
another table and then use that for lookups of sums. It wouldn't be a very
general solution (you need to know ahead of time what aggregates you want to
query), but it might satisfy your needs.
Sean
