Oracle赋予用户sysdba权限

以SYS用户进入Oracle，

SQL> grant sysdba to username;

grant sysdba to username

*
ERROR at line 1:
ORA-01994: GRANT failed: password file missing or disabled

首先，把初始化参数REMOTE_LOGIN_PASSWORDFILE的值改成EXCLUSIVE

如果还是有问题，可能是缺少密码文件，用orapwd创建密码文件

$ orapwd -h
Usage: orapwd file=<fname> password=<password> entries=<users>

where
file - name of password file (mand),
password - password for SYS (mand),
entries - maximum number of distinct DBA and OPERs (opt),
There are no spaces around the equal-to (=) character.

这个命令很简单，密码文件一般放在$ORACLE_HOME/dbs目录下，命名规则为orapd+SID,

orapwd FILE='/db/oracle/product/10.2.0/db_1/dbs/orapw+SID'  PASSWORD=oracle   ENTRIES=5  FORCE=y

然后再执行

SQL> grant sysdba to username;

Grant succeeded.

检查

SQL> select * from v$pwfile_users;

USERNAME                       SYSDB SYSOP
------------------------------ ----- -----
SYS                            TRUE  TRUE
******                          TRUE  FALSE

SYSDB那一栏是TRUE就对了

然后就可以as sysdba连接了