在Oracle数据库中如何找出损坏索引呢？ 下面我们人为构造一个案例，将索引块损坏。如下案例所示：
SQL> create tablespace test_data
2 datafile '/u01/app/oracle/oradata/gsp/test_data_01.dbf'
3 size 200M autoextend off
4 logging
5 segment space management auto
6 extent management local;
Tablespace created.
SQL> create tablespace test_index
2 datafile '/u01/app/oracle/oradata/gsp/test_idx_01.dbf'
3 size 200M autoextend off
4 logging
5 segment space management auto
6 extent management local;
Tablespace created.
SQL> create user kerry
2 identified by 123456
3 default tablespace test_data;
User created.
SQL> grant connect to kerry;
SQL> grant resource to kerry;