SQL> create user abcd identified by aaaa;

User created.

SQL> desc dba_users;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 USERNAME                                  NOT NULL VARCHAR2(30)
 USER_ID                                   NOT NULL NUMBER
 PASSWORD                                           VARCHAR2(30)
 ACCOUNT_STATUS                            NOT NULL VARCHAR2(32)
 LOCK_DATE                                          DATE
 EXPIRY_DATE                                        DATE
 DEFAULT_TABLESPACE                        NOT NULL VARCHAR2(30)
 TEMPORARY_TABLESPACE                      NOT NULL VARCHAR2(30)
 CREATED                                   NOT NULL DATE
 PROFILE                                   NOT NULL VARCHAR2(30)
 INITIAL_RSRC_CONSUMER_GROUP                        VARCHAR2(30)
 EXTERNAL_NAME                                      VARCHAR2(4000)


SQL> select USERNAME,ACCOUNT_STATUS from dba_users;

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
MGMT_VIEW                      OPEN
SYS                            OPEN
SYSTEM                         OPEN
DBSNMP                         OPEN
SYSMAN                         OPEN
ABCD                           OPEN
OUTLN                          EXPIRED & LOCKED
MDSYS                          EXPIRED & LOCKED
ORDSYS                         EXPIRED & LOCKED
EXFSYS                         EXPIRED & LOCKED
DMSYS                          EXPIRED & LOCKED

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
WMSYS                          EXPIRED & LOCKED
CTXSYS                         EXPIRED & LOCKED
ANONYMOUS                      EXPIRED & LOCKED
XDB                            EXPIRED & LOCKED
ORDPLUGINS                     EXPIRED & LOCKED
SI_INFORMTN_SCHEMA             EXPIRED & LOCKED
OLAPSYS                        EXPIRED & LOCKED
SCOTT                          EXPIRED & LOCKED
TSMSYS                         EXPIRED & LOCKED
BI                             EXPIRED & LOCKED
PM                             EXPIRED & LOCKED

USERNAME                       ACCOUNT_STATUS
------------------------------ --------------------------------
MDDATA                         EXPIRED & LOCKED
IX                             EXPIRED & LOCKED
SH                             EXPIRED & LOCKED
DIP                            EXPIRED & LOCKED
OE                             EXPIRED & LOCKED
HR                             EXPIRED & LOCKED

28 rows selected.

SQL> drop user abcd;

User dropped.

SQL> create user abcd identified by abcd account unlock;

User created.

SQL> grant connect,resource to abcd;

Grant succeeded.