1、检查无效的数据库对象

select owner,object_name,object_type,status

from dba_objects

where status = 'INVALID';

2、检查不起作用的约束

select owner,constraint_name,table_name,constraint_type,status

from dba_constraints

where status = 'DISABLED';

3 、检查无效的触发器

select owner,trigger_name,table_name,status

from dba_triggers

where status = 'DISABLED';

4、检查失效的索引

select  index_name,table_name,tablespace_name,status

from dba_indexes

where status <>'VALID';