Error in creating user in SQL plus in Oracle12c?

Question

Hi,
I am trying to create user in oracle 12c sqlplus. But it displays error as "invalid common user or role name". How to rectify this error?
I am using this command : create user scott identified by tiger profile DEFAULT account unlock default tablespace  SYSTEM;
Please suggest how to create user.
Thanks & Regards,
Trikoti Mohan.

Answer 1

I am trying to create user in oracle 12c sqlplus. But it displays error as "invalid common user or role name". How to rectify this error?
I am using this command : create user scott identified by tiger profile DEFAULT account unlock default tablespace  SYSTEM;
Please suggest how to create user.
Many things, even basic things like creating users, are done differently in 12c. In 12c there are common users and local users. You need to know and understand the difference. My 'guess' is that you are trying to create that user and getting an exception because you are trying to create that user in the root CDB and you can ONLY create common users in the root. And SCOTT can not possibly be a common user because common users are defined differently.
You also need to read and understand chapters 17 and 18 of the Concepts doc about the new multitenant architecture of 12c.
http://docs.oracle.com/cd/E16655_01/server.121/e17633/part_consol.htm#CHDGDBHJ
See the sections in those chapters about common and local users.
Then read my last reply in this thread:
Re: 12c: ORA-65049: creation of local user or role is not allowed in CDB$ROOT
There are TWO MORE issues you may have had or may have.
1. The SCOTT user already exists if you created the example database as part of the installation. But that sample DB (and the SCOTT/HR and other users) are in a PDB and NOT in the root/CDB.
2. By default the root/CDB is the ONLY database affected by the STARTUP command. So if you start a multitenant database that has one or more PDBs (e.g. PDBORCL installed as the example DB) those PDBs will NOT be open or accessible until you MANUALLY open them.
Alternatively you can create an AFTER STARTUP trigger that opens PDBs for you as part of the startup process.
Lastly you should NOT alter the SYSTEM tablespace or schema or use them for your own objects.
There are several other threads in this forum where I discuss other issues new 12c users are likely to run into. Search for rp0428.