Oracle Database Users

List all the Oracle Users Account Information for the Oracle Database



SQL Code

 1set pages 999 lines 100
 2col username	format a20
 3col status	format a8
 4col tablespace	format a20
 5col temp_ts	format a20
 6select	username
 7,	account_status status
 8,	created
 9,	default_tablespace tablespace
10,	temporary_tablespace temp_ts
11from	dba_users
12order	by username
13/

Sample Oracle Output:

1
2no rows selected
3SQL>

Purpose:

  • To retrieve information about user accounts in the Oracle database and present it in a clear and organized format.

Breakdown:

Formatting Output:

*   `set pages 999 lines 100`: Adjusts the output display to accommodate a large number of results (up to 999 pages with 100 lines per page).
*   `col username format a20`: Sets the width of the `username` column to 20 characters for better readability.
*   `col status format a8`: Sets the width of the `status` column to 8 characters.
*   `col tablespace format a20`: Sets the width of the `tablespace` column to 20 characters.
*   `col temp_ts format a20`: Sets the width of the `temporary_tablespace` column to 20 characters.

Querying Data:

*   `select username, account_status status, created, default_tablespace tablespace, temporary_tablespace temp_ts from dba_users`: Retrieves specific columns of information about users from the `dba_users` data dictionary view.
*   `order by username`: Organizs the results alphabetically by username, enhancing readability and searchability.

Key Points:

  • Queries the dba_users view, a central repository of user account information.

  • Retrieves essential details about each user:

    • username: The unique name for each user account.
    • account_status: Indicates whether the account is open, locked, expired, or has other statuses.
    • created: The date and time when the account was created.
    • default_tablespace: The default storage location for objects created by the user.
    • temporary_tablespace: The temporary storage area used for sorting and other operations.
  • Organizes results alphabetically by username for easy navigation.

Insights and Explanations:

  • This query is commonly used for database administration tasks, such as:

    • Monitoring user account status and activity.
    • Identifying inactive or locked accounts.
    • Analyzing user resource usage.
    • Troubleshooting authentication issues.
    • Planning for storage capacity.
  • It provides valuable insights into the database's user population and their resource utilization patterns.

  • It can be further customized with filters and additional columns to address specific information needs.

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