Keyan's questions

我已经创建用户oracle 19c并授予权限，但我无法使用该用户登录，并出现登录被拒绝错误。

我已经从命令提示符登录 sqlplus / as sysdba

然后我创建了用户

create user "c##keyan" identified by "keyan123";

我授予以下权限

    grant connect to "c##keyan";
    grant dba to "c##keyan";
    grant resource to "c##keyan";
    grant create session  to "c##keyan";

我的 listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = ORCL)
      (ORACLE_HOME = H:\WINDOWS.X64_193000_db_home)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (SID_NAME = ORCL)
      (ORACLE_HOME =  H:\WINDOWS.X64_193000_db_home)
    )
  )

我的 tnsnames.ora

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

此后我退出 sql 提示符并再次从命令提示符登录 sqlplus c##keyan/keyan123@//localhost:1521/orcl

我收到此错误 错误：

ORA-01017: invalid username/password; logon denied

我是否遗漏了什么？请提供建议。