Detailed explanation of the management method of read-only permissions on Oracle tables

Detailed explanation of the management method of read-only permissions on Oracle tables

In Oracle database, it is very important to manage read-only permissions on tables, which can effectively protect the data. integrity and security. This article will introduce in detail how to manage read-only permissions on tables in Oracle database and provide specific code examples.

1. Grant read-only permission to the user

1. Use the GRANT statement to grant read-only permission to the user:

GRANT SELECT ON table_name TO user_name;

Example: Grant read-only permissions to table employee to user jason

GRANT SELECT ON employee TO jason;

2. Use role to grant read-only permissions:

Create a read-only role:

CREATE ROLE read_only_role;

Grant read-only permissions to a role:

GRANT SELECT ON table_name TO read_only_role;

Give the role to the user:

GRANT read_only_role TO user_name;

Example: Create the read-only role read_only, grant read-only permissions to the table employee to the role, and then grant the read_only role to the user jason

CREATE ROLE read_only_role;
GRANT SELECT ON TO employee read_only_role;
GRANT read_only_role TO jason;

2. Revoke read-only permission

1. Use the REVOKE statement to revoke read-only permissions:

REVOKE SELECT ON table_name FROM user_name;

Example: revoke user Jason's read-only permissions on table employee

REVOKE SELECT ON employee FROM jason;

2. Revoke the read-only permission of the role:

REVOKE SELECT ON table_name FROM role_name;
REVOKE role_name FROM user_name;

Example: revoke the read_only role's read-only permissions on table employee, and then revoke the read_only role from user Jason

REVOKE SELECT ON employee FROM read_only_role;
REVOKE read_only_role FROM Jason;

三, View table permissions

1. Use the following SQL statement to view the user or role permissions on the table:

SELECT * FROM user_tab_privs WHERE table_name = 'table_name';

Example: View the permissions of user Jason on the table employee

SELECT * FROM user_tab_privs WHERE table_name = 'employee';

2. View the permissions of the role on the table:

SELECT * FROM role_tab_privs WHERE table_name = 'table_name';

Example: View the permissions of the read_only role on the table employee

SELECT * FROM role_tab_privs WHERE table_name = 'employee';

Through the above methods, the read-only permissions of tables can be flexibly managed in the Oracle database to protect the integrity and security of the data. We hope that the specific code examples provided in this article can help readers better understand and apply these permission management methods.

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