Robert Citek wrote:

> create table foo (
>  col_1, col_2, col_3, col_4, col_5, col_6, col_7, col_8, col_9,
>  col_10, col_11, col_12, col_13, col_14, col_15, col_16, col_17,
>  col_18, col_19, col_20, col_21, col_22 ) ;
> .mode tab
> .imp "foo.tsv" "foo"
> select col_9, col_22, count(*) as "count" from foo group by col_9, col_22 ;

Try this with index created on foo(col_9, col_22).
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