1 create table t1 (f1 int primary key, f2 int);
2 create index idx2 on t1(f2);
3 insert into t1 values(1,11);
4 insert into t1 values(2,21);
5 insert into t1 values(3,31);
6 insert into t1 values(4,41);
7 insert into t1 values(5,51);
8 insert into t1 values(6,61);
9 insert into t1 values(7,71);
10 insert into t1 values(8,81);
11 insert into t1 values(9,91);
12 insert into t1 values(10,101);