Practical Guide: Implementing table-level read-only permissions in Oracle

Achieving table-level read-only permissions in Oracle is a common and important operation in database management. By setting read-only permissions, you can ensure that some users can only query table data but cannot modify it, thus effectively protecting the integrity and security of the data. The following will introduce in detail how to implement table-level read-only permissions in Oracle, as well as specific code examples.

Step 1: Create a table

First, create a sample table in Oracle to demonstrate how to set table-level read-only permissions. Suppose we create a table named "example_table" with two fields: id and name.

CREATE TABLE example_table (
    id INT PRIMARY KEY,
    name VARCHAR2(50)
);

INSERT INTO example_table (id, name) VALUES (1, 'Alice');
INSERT INTO example_table (id, name) VALUES (2, 'Bob');

Step 2: Create a read-only role

Next, we need to create a read-only role to give the user read-only permissions. Execute the following SQL statement:

CREATE ROLE read_only_role;

Step 3: Grant table-level read-only permissions

Give read-only permissions to the newly created read-only role to restrict modification operations to the "example_table" table.

GRANT SELECT ON example_table TO read_only_role;

Step 4: Create a read-only user

Create a read-only user and assign the previously created read-only role to the user.

CREATE USER read_only_user IDENTIFIED BY password;
GRANT read_only_role TO read_only_user;

Step 5: Verify permission settings

Finally, log in to the Oracle database as a read-only user and try to modify the "example_table" table, such as inserting, updating, or deleting data. It can be seen that read-only users cannot perform these operations and can only perform query operations.

Summary

Through the above steps, we successfully implemented the operation of setting table-level read-only permissions in Oracle. By creating a read-only role, granting read-only permissions to specific tables, and then assigning the read-only role to users, you can effectively restrict users' operations on the tables and ensure data security and integrity. In actual applications, permission settings can be flexibly adjusted according to specific needs to ensure data security.

We hope that the above practical guide and code examples can help you better understand the method of implementing table-level read-only permissions in Oracle, and can successfully apply it to your database management work. Good luck!

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