Re: Increasing GROUP BY CHAR columns speed

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I it seems that slowness is caused by grouping by column

exchrate numeric(13,8)

exchrate has different values in few rows.
It has usually value 0
In this sample query it is always 0.

I tried not change exchrate with nullif( bilkaib.EXCHRATE,0)
but this does not up speed query, no idea why.

Andrus.

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