Invalid Objects In Oracle Database ?

Invalid Objects In Oracle Database ?

select created,owner,object_name,object_type from dba_objects where status='INVALID' order by 1;

select owner,count(*) from dba_objects where status='INVALID' group by owner ORDER BY 2 DESC;

select owner,count(*) from dba_objects where status='INVALID' group by owner;

--Inv. creation date

select created,owner,object_name,object_type,status from dba_objects where created >=sysdate -1 and owner not in ('SYS','PUBLIC') order by 1 desc;