How to Grant Privileges for User Access in Oracle SQL Developer

Discover how to effectively grant user `privileges` to access other users in Oracle SQL Developer with practical steps for both DML and DDL operations.
---
This video is based on the question https://stackoverflow.com/q/71872631/ asked by the user 'Shishank Jain' ( https://stackoverflow.com/u/18556058/ ) and on the answer https://stackoverflow.com/a/71873005/ provided by the user 'pmdba' ( https://stackoverflow.com/u/12913491/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to grant privileges to one user to access other users in Oracle?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Grant Privileges for User Access in Oracle SQL Developer

Managing user permissions and privileges is a critical aspect of database administration in Oracle SQL Developer. One common scenario faced by database administrators (DBAs) is the need to grant one user the ability to access and perform operations on another user's schema. In this guide, we will explore how to grant user privileges for a specific use case involving three schemas: DEMO1, DEMO2, and DEMO3.

The Problem

Imagine you have three different schemas in your Oracle database:

DEMO1

DEMO2

DEMO3

In this scenario, you want to allow the user associated with DEMO1 to perform all operations (Select, Update, Insert, Delete) on the tables belonging to DEMO2, while restricting access to DEMO3. This raises the question: How can you effectively grant these privileges in Oracle SQL Developer?

Understanding Privilege Types

Before diving into the solution, it’s essential to understand the types of privileges:

DML Privileges: These allow users to manipulate data within tables. Common DML operations include:

Insert: Adding new records

Update: Modifying existing records

Delete: Removing records

DDL Privileges: These allow users to perform structural changes to the database, such as creating or dropping tables. Granting DDL privileges is more complex and usually involves higher-level permissions.

Granting DML Privileges to DEMO1

The simplest way to grant DEMO1 access to DEMO2 while excluding DEMO3 is to create a role that encapsulates the necessary DML privileges. Here’s how you can do that:

Step 1: Create a New Role

First, create a role that will hold the privileges for DEMO2.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Grant Table Privileges

Next, grant the desired DML privileges for the tables in DEMO2 to this newly created role. For example:

[[See Video to Reveal this Text or Code Snippet]]

Add as many tables as needed to cover all required operations.

Step 3: Assign the Role to DEMO1

Now, grant the role to DEMO1 using the following command:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Set the Default Role

Finally, ensure DEMO1 uses the granted role as the default role:

[[See Video to Reveal this Text or Code Snippet]]

Granting DDL Privileges (If Necessary)

If DEMO1 also requires DDL privileges (to create or modify tables), the situation becomes more straightforward with the use of proxy privileges.

Step 1: Grant Proxy Privileges

You’ll need to give DEMO1 the ability to connect through DEMO2 by using the following command:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Connect as DEMO2

When DEMO1 needs to perform operations as DEMO2, they can connect using the proxy method. The connection syntax looks like this:

[[See Video to Reveal this Text or Code Snippet]]

With this connection, DEMO1 effectively becomes DEMO2 and can perform any operation that DEMO2 is allowed to do on its objects. However, keep in mind that while connected this way, DEMO1 will not have access to its own objects.

Conclusion

Granting user privileges in Oracle SQL Developer can require careful planning and awareness of the distinctions between DML and DDL privileges. By employing roles for DML access and utilizing proxy grants for enhanced DDL capabilities, you can create a safe and effective permission structure within your Oracle database. Always remember to assess the necessary privileges based on the specific needs of each user to maintain security and data integrity.

If you have further questions or another scenario to discuss, feel free to leave a comment below!

Видео How to Grant Privileges for User Access in Oracle SQL Developer канала vlogize