On 9/16/18, John Found <johnfo...@asm32.info> wrote:
>
> Is it means that in every query that uses GROUP BY and ORDER BY
> simultaneously, one of the operations will always be provided by using
> temporary b-tree?
>

no.

CREATE TABLE t1(a,b,c, PRIMARY KEY(a,b)) WITHOUT ROWID;
explain query plan
SELECT a, b, sum(c) FROM t1 GROUP BY a, b ORDER BY a, b;

-- 
D. Richard Hipp
d...@sqlite.org
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