SQL> create user hr identified by hr container=current;
SQL> select con_id,name,open_mode from v$pdbs;
CON_ID NAME OPEN_MODE
---------- ------------------------------ ----------
4 SZTECH1 READ WRITE
SQL> select username,con_id,account_status from cdb_users where account_status='OPEN' ;
USERNAME CON_ID ACCOUNT_STATUS
------------------------------ ---------- --------------------------------
SYS 4 OPEN
SYSTEM 4 OPEN
PDBADMIN 4 OPEN
HR 4 OPEN