====== Duplicate PDB to same CDB ======

  * clone
<code PLSQL>
create pluggable database pdb1_clone from pdb1;
alter pluggable database pdb1_clone open [instance=all];
</code>

  * check status
<code PLSQL>
set lines 200
column name format a30
select INST_ID, CON_ID, NAME, OPEN_MODE, RESTRICTED 
from gv$pdbs
where name='pdb1_clone ';
</code>