Differences between SYS.ALL_OBJECTS and SYS.DBA_OBJECTS

Question

Hi All
I'm a beginner to ORACLE :)
when I login as sysdba, and issue below sql:
select count(*) from sys.dba_objects;
COUNT(*)
71596
select count(*) from sys.all_objects;
COUNT(*)
70772
Shouldn't it be equal? what is the objects that sys.all_objects can not see?
Thanks
Emily

Answer 1

On my XE databases, related objects are LOBs, database links and queue:
SQL> select owner, object_type from (select * from dba_objects minus select * from all_objects) group by owner, object_type;
OWNER                          OBJECT_TYPE
TSMSYS                         LOB
CTXSYS                         LOB
PUBLIC                         DATABASE LINK
MDSYS                          LOB
XDB                            LOB
CTXTEST                        LOB
OUTLN                          LOB
FLOWS_020100                   LOB
FLOWS_FILES                    LOB
SYSTEM                         QUEUE
SYSTEM                         LOB
OWNER                          OBJECT_TYPE
TEST                           LOB
12 ligne(s) sélectionnée(s).It is possible that this difference exists because you cannot grant object privilege for these object types. For example, a LOB belongs to another database object generally a table: you cannot run "CREATE LOB" or "GRANT ... ON <LOB> TO ...".
Edited by: P. Forstmann on Jun 12, 2009 9:52 AM