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Message Posted: Thu, 01 Dec 2011 @ 16:28:24 GMT
We have this query :
SELECT Column1 ,Column2 ,Column3 . ,Column19 , SUM(column1) ,SUM(column2) ,SUM(column3) . ,SUM(column21) FROM TABLE1 INNER JOIN TABLE2 INNER JOIN TABLE3 . INNER JOIN TABLE7 GROUP BY 1, 2, 3?.19;
If we only run the from part with a COUNT, like it is showed below, it gets less than 1 minut to end:
SELECT COUNT(1) FROM TABLE1 INNER JOIN TABLE2 INNER JOIN TABLE3 . INNER JOIN TABLE7
But, if we run the query all together with the sum and the group by part the query lasts more than half an hour.
I've checked all the statistics with the ?diagnostic helpstats on for session
I think that I have all the indexes that I need, although I don't know if that can improve or not the result.
Any idea how to optimize this query? I'm going crazy here.
FINA RODRIGUEZ POSADA
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