ORACLE11g错误密码登录默认是10次，10次错误后用户将被锁定，如下：
SQL> conn test/123456
ERROR: ORA-28000: the account is locked
1.查看被锁定的用户
SQL> select LOCK_DATE,username from dba_users where username=\'GXGAT\';
LOCK_DATE USERNAME
--------- ------------------------------
16-JUN-20 TEST
LOCK_DATE为空说明没有锁定，非空为锁定。
或
SELECT S.USERNAME,
DECODE(L.TYPE, \'TM\', \'TABLE LOCK\', \'TX\', \'ROW LOCK\', NULL) LOCK_LEVEL,
O.OWNER,
O.OBJECT_NAME,
O.OBJECT_TYPE,
S.SID,
S.SERIAL#,
S.TERMINAL,
S.MACHINE,
S.PROGRAM,
S.OSUSER
FROM V$SESSION S, V$LOCK L, DBA_OBJECTS O
WHERE S.SID = L.SID
AND O.OBJECT_ID = L.ID1
AND S.USERNAME IS NOT NULL;
2.解锁用户方式：
登陆sys用户，执行解锁命令
SQL> alter user test account unlock;
User altered.
SQL> conn test/password
Connected.
3.现在我们来查看下默认连接错误锁定次数
SQL> select * from dba_profiles where resource_name like \'FAILED_LOGIN_ATTEMPTS%\';
PROFILE RESOURCE_NAME RESOURCE LIMIT
-------------------------------------------------------------------------------------------------------------------------------- -------------------------------- -------- ---------------------------------------------------------------------------------------------------------------
COM INH IMP
--- --- ---
DEFAULT FAILED_LOGIN_ATTEMPTS PASSWORD 10
NO NO NO
4.修改默认的错误登录次数，为不限制（为安全起见，不建议使用）
SQL> alter profile DEFAULT limit FAILED_LOGIN_ATTEMPTS UNLIMITED;
SQL>alter profile default limit failed_login_attempts 20; //修改为20次