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create table t (shopID int, supplier char(1), supply_count int); insert into t select 1, 'a', 12; insert into t select 1, 'a', 12; insert into t select 2, 'b', 12; insert into t select 2, 'f', 12; insert into t select 2, 'r', 8; insert into t select 2, 'p', 7; insert into t select 3, 'b', 5; insert into t select 3, 'a', 2; insert into t select 3, 'a', 5; insert into t select 3, 'a', 2; insert into t select 4, 'f', 15; insert into t select 4, 'c', 11;
with c as ( select *, case when dense_rank() over(partition by shopid order by supply_count desc)=2 or Min(supply_count) over(partition by shopid) =Max(supply_count) over(partition by shopid) then 1 else 0 end as valid from t ) select distinct shopId, supply_count from c where valid=1
shopId
supply_count
1
12
2
8
3
2
4
11