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Cannot connect to database

user6476743 Member Posts: 2
edited Mar 16, 2015 9:40AM in Database Ideas - Ideas

Hello All,

I'm new to Oracle Database.

I changed the password for sys user using

alter user SYS identified by "[email protected]"

and tried to connect using the following command

sqlplus /nolog

SQL> connect sys as sysdba

Enter password:


ORA-12154: TNS:could not resolve the connect identifier specified


how can I solve this error ?

Thanks & Regards

0 votes

Active · Last Updated


  • Unknown
    edited Mar 16, 2015 9:42AM

    *** moderation ***

    This post of yours is not an "IDEA", yet that is the sort of post that you have created.

    You are posting a question that describes some sort of issue you see and are asking for help.

    Therefore this post does not belong in the "Idea" section.   It will be deleted.

    If you need to request help with an issue, then start a discussion on your topic.   By default, it will be toggled as a question and people will be able to respond with guidance.   Be sure to post it into the proper discussion space for whatever software you are dealing with.