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create table t(c1 int, c2 char(1), c3 int, c4 char(1), c5 int); insert into t select 1, 'A', 1, 'E', 1; insert into t select 2, 'A', 1, 'E', 1; insert into t select 3, 'A', 2, 'Q', 1; insert into t select 4, 'D', 3, 'P', 2; insert into t select 5, 'B', 2, 'Q', 3; insert into t select 6, 'A', 1, 'R', 2;
with g as ( select *, Row_Number() over (order by c1) - Row_Number() over(partition by c2 order by c1) gp from t ), fl as ( select *, First_Value(c3) over(partition by gp order by c1) f, First_Value(c4) over(partition by gp order by c1 desc) l from g ) select c2,f First,l Last, Sum(c5) Sum from fl group by c2, f, l order by Min(c1);
c2
First
Last
Sum
A
1
Q
3
D
3
P
2
B
2
Q
3
A
1
R
2