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declare @rateSum numeric(12,2) = 14.7можете попробовать
declare @tbl table (id int, rate numeric(12,2), somyType int)
insert @tbl (id, rate, somyType)
values
(1, 10.00, 1),
(2, 7.70, 1),
(3, 5.70, 1),
(4, 9.99, 2),
(5, 4.00, 2),
(6, 7.01, 3)
-- etc
-- error
select id from @tbl t0
group by somyType
having sum(rate) < @rateSum
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