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id a b
-----------
1 2 12
1 1 100
1 2 123
1 1 130
1 2 153
1 1 171
1 1 188
1 2 200
1 2 222
1 1 234
1 2 333
1 2 344
1 2 411
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id b1 b2
-----------------
1 100 123
1 130 153
1 171 188
1 188 200
1 234 333
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SQL code:
create table test1(id number(18,0), a number(18,0), b number(18,0));
insert into test1(id, a, b) values(1,2,12);
insert into test1(id, a, b) values(1,1,100);
insert into test1(id, a, b) values(1,2,123);
insert into test1(id, a, b) values(1,1,130);
insert into test1(id, a, b) values(1,2,153);
insert into test1(id, a, b) valu
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