3

I am new to oracle server 18c (currently taking online course). My problem is sql*plus where I tried to use sqlplus then sys as sysdba (it did not work) and the error appeared below. enter image description here

However, if I use sqlplus / as sysdba (it worked, and I don't know why) enter image description here

I have tried this command: lsnrctl start, but again not working. In addition, I have checked my listener.ora and tnsnames.oraca enter image description here enter image description here

I have attached my environment set up in .bash_profile enter image description here

Please help me this. Thank you

Improve this question
2
  • 1
    Let me guess. The password you entered contains the @ character.
    – Balazs Papp
    Nov 11, 2019 at 14:27
  • yes, it was contained @ in the password
    – Khang Mai
    Nov 11, 2019 at 14:41

1 Answer 1

Reset to default
8

If the password contains special characters such as @, enter the password between double quotes:

$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Nov 11 15:41:40 2019
Version 19.5.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.5.0.0.0

SQL> connect sys/a@abcd as sysdba
ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified


Warning: You are no longer connected to ORACLE.
SQL> connect sys/"a@abcd" as sysdba
Connected.
SQL>
Improve this answer
2
  • A bit of explanation. In your failed attempt, you supplied a pswd that contained a '@' which gets interpreted as a delimiter of the connection string, so the password gets shorted, and an invalid connect string is passed. In the successful attempt '/ as sysdba', no username/password was needed because the stand-alone '/' indicates to use OS authentication - trust the OS to have authenticated a user that is a member of the OS 'dba' group.
    – EdStevens
    Nov 11, 2019 at 21:07
  • I wanted to thank you, after countless hours of searching, this worked for me: connect sys/"a@abcd" as sysdba Even when I used the Oracle appliance, with the default password of "oracle" This did not make any sense, but I am happy I am in now.
    – Steve
    Nov 10, 2022 at 2:10

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.