How to remove tables, views, index installed during installation

Question

Here is the statement I'm using for a college class to show the content of the catalog. However when ran it outputs 1346 lines of data of which 90% are files loaded during installtion.
select substr(object_name, 1, 20), object_type, status
from user_objects
SPOOL OFF
Partial results of SQL statement.
SUBSTR(OBJECT_NAME,1 OBJECT_TYPE STATUS
MGMT_JOB_CALLBACKS TABLE VALID
PK_MGMT_JOB_CALLBACK INDEX VALID
MGMT_JOB_QUEUES TABLE VALID
PK_JOB_QUEUE INDEX VALID
MGMT_JOB_BLACKOUT_AS TABLE VALID
PK_MGMT_JOB_BLACKOUT INDEX VALID
MGMT_JOB_SEQUENCE SEQUENCE VALID
MGMT_PERFORMANCE_NAM TABLE VALID
MGMT_PERFORMANCE_NAM INDEX VALID
MGMT_SYSTEM_ERROR_LO TABLE VALID
MGMT_SYSTEM_PERFORMA TABLE VALID
How can I wipe the database clean so that only my data is there?
Thanks

Answer 1

You can come up with a script as follows, which is an example.
declare
cursor cursor1 is select owner,object_name,object_type from dba_objects where owner=' user560741';
ddlsql varchar2(100);
begin
for cur1_rec in cursor1 loop
if (cur1_rec.object_type like 'TABLE') then
ddlsql:='drop ' || cur1_rec.object_type || ' ' || cur1_rec.owner||'.'||cur1_rec.object_name ||' cascade constraint';
else
ddlsql:='drop ' || cur1_rec.object_type || ' ' || cur1_rec.owner||'.'||cur1_rec.object_name;
end if;
begin
     execute immediate ddlsql;
exception
when others then
     ddlsql:='';
end;
end loop;
end;
/