totn Oracle / PLSQL

Oracle / PLSQL: CREATE USER statement

This Oracle tutorial explains how to use the Oracle CREATE USER statement with syntax and examples.

Description

The CREATE USER statement creates a database account that allows you to log into the Oracle database.

Syntax

The syntax for the CREATE USER statement in Oracle/PLSQL is:

CREATE USER user_name 
  IDENTIFIED { BY password
             | EXTERNALLY [ AS 'certificate_DN' ]
             | GLOBALLY [ AS '[ directory_DN ]' ]
             }
  [ DEFAULT TABLESPACE tablespace
  | TEMPORARY TABLESPACE
       { tablespace | tablespace_group }
  | QUOTA integer [ K | M | G | T | P | E ]
        | UNLIMITED }
        ON tablespace
    [ QUOTA integer [ K | M | G | T | P | E ]
        | UNLIMITED }
            ON tablespace
    ]
  | PROFILE profile_name
  | PASSWORD EXPIRE
  | ACCOUNT { LOCK | UNLOCK }
     [ DEFAULT TABLESPACE tablespace
     | TEMPORARY TABLESPACE
         { tablespace | tablespace_group }
     | QUOTA integer [ K | M | G | T | P | E ]
           | UNLIMITED }
           ON tablespace
       [ QUOTA integer [ K | M | G | T | P | E ]
           | UNLIMITED }
           ON tablespace
        ]
     | PROFILE profile
     | PASSWORD EXPIRE
     | ACCOUNT { LOCK | UNLOCK } ]
     ] ;

Parameters or Arguments

user_name
The name of the database account that you wish to create.
PROFILE profile_name
Optional. It is the name of the profile that you wish to assign to the user account to limit the amount of database resources assigned to the user account. If you omit this option, the DEFAULT profile is assigned to the user.
PASSWORD EXPIRE
Optional. If this option is set, then the password must be reset before the user can log into the Oracle database.
ACCOUNT LOCK
Optional. It disables access to the user account.
ACCOUNT UNLOCK
Optional. It enables access to the user account.

Example

If you wanted to execute a simple CREATE USER statement that creates a new user and assigns a password, you could do the following:

For example:

CREATE USER smithj
  IDENTIFIED BY pwd4smithj
  DEFAULT TABLESPACE tbs_perm_01
  TEMPORARY TABLESPACE tbs_temp_01
  QUOTA 20M on tbs_perm_01;

This CREATE USER statement would create a new user called smithj in the Oracle database whose password is pwd4smithj, the default tablespace would be tbs_perm_01 with a quota of 20MB, and the temporary tablespace would be tbs_temp_01.

If you wanted to make sure that the user changed their password before logging into the database, you could add the PASSWORD EXPIRE option as follows:

CREATE USER smithj
  IDENTIFIED BY pwd4smithj
  DEFAULT TABLESPACE tbs_perm_01
  TEMPORARY TABLESPACE tbs_temp_01
  QUOTA 20M on tbs_perm_01
  PASSWORD EXPIRE;

External Database User

To create an External Database user, you could execute the following CREATE USER statement:

CREATE USER external_user1
  IDENTIFIED EXTERNALLY
  DEFAULT TABLESPACE tbs_perm_01
  QUOTA 5M on tbs_perm_01
  PROFILE external_user_profile;

This CREATE USER statement would create an External Database user called external_user1 that has a default tablespace of tbs_perm_01 with a quote of 5MB, and is limited by the database resources assigned to external_user_profile.

To create an External Database user that is only accessible by an operating system account, you could run the following CREATE USER statement:

CREATE USER ops$external_user1
  IDENTIFIED EXTERNALLY
  DEFAULT TABLESPACE tbs_perm_01
  QUOTA 5M on tbs_perm_01
  PROFILE external_user_profile;

Note that the only difference between this CREATE USER statement and the previous is the ops$ in front of the user_name.

Global Database User

To create a Global Database user, you could execute the following CREATE USER statement:

CREATE USER global_user1
  IDENTIFIED GLOBALLY AS 'CN=manager, OU=division, O=oracle, C=US'
  DEFAULT TABLESPACE tbs_perm_01
  QUOTA 10M on tbs_perm_01;

This CREATE USER statement would create a Global Database user called global_user1 that has a default tablespace of tbs_perm_01 with a quote of 10M.

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