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sqlplus sys/pwd as sysdba

sql->alter user jd account unlock;

commit;

SQL> password new;
Changing password for new
New password: **
Retype new password: ** (new)
Password changed
SQL>

SQL> conn new/new;
Connected.
SQL>

批量所用户

SQL> select username, DEFAULT_TABLESPACE from dba_users;

USERNAME                       DEFAULT_TABLESPACE
------------------------------ ------------------------------
SYS                            SYSTEM
SYSTEM                         SYSTEM
DBSNMP                         SYSAUX
SYSMAN                         SYSAUX
SCOTT                          USERS
MAX                            USERS
HR                             USERS
TEST                           TEST
OUTLN                          SYSTEM
FLOWS_FILES                    SYSAUX
MDSYS                          SYSAUX

USERNAME                       DEFAULT_TABLESPACE
------------------------------ ------------------------------
ORDSYS                         SYSAUX
EXFSYS                         SYSAUX
WMSYS                          SYSAUX
APPQOSSYS                      SYSAUX
APEX_030200                    SYSAUX
OWBSYS_AUDIT                   SYSAUX
ORDDATA                        SYSAUX
CTXSYS                         SYSAUX
ANONYMOUS                      SYSAUX
XDB                            SYSAUX
ORDPLUGINS                     SYSAUX

USERNAME                       DEFAULT_TABLESPACE
------------------------------ ------------------------------
OWBSYS                         SYSAUX
SI_INFORMTN_SCHEMA             SYSAUX
OLAPSYS                        SYSAUX
ORACLE_OCM                     USERS
XS$NULL                        USERS
BI                             USERS
PM                             USERS
MDDATA                         USERS
IX                             USERS
SH                             USERS
DIP                            USERS

USERNAME                       DEFAULT_TABLESPACE
------------------------------ ------------------------------
OE                             USERS
APEX_PUBLIC_USER               USERS
SPATIAL_CSW_ADMIN_USR          USERS
SPATIAL_WFS_ADMIN_USR          USERS

37 rows selected.

SQL> select 'alter user ' || username || ' account lock' || ';' from dba_users
  2  where default_tablespace  ='USERS'
  3  and username like 'H%'
  4  order by username ;

'ALTERUSER'||USERNAME||'ACCOUNTLOCK'||';'
-------------------------------------------------------
alter user HR account lock;

SQL> select 'alter user ' || username || ' account lock' || ';' from dba_users
  2  where default_tablespace in ('USERS','SYSTEM')
  3  and username like 'S%'
  4  order by username ;

'ALTERUSER'||USERNAME||'ACCOUNTLOCK'||';'
-------------------------------------------------------
alter user SCOTT account lock;
alter user SH account lock;
alter user SPATIAL_CSW_ADMIN_USR account lock;
alter user SPATIAL_WFS_ADMIN_USR account lock;
alter user SYS account lock;
alter user SYSTEM account lock;

6 rows selected.