oracle query user permissions

Oracle is a relational database management system, which is characterized by powerful functions, fast speed, and high reliability. In Oracle, user permissions are a very important concept. By properly configuring user permissions, administrators can ensure the security and integrity of the system. This article will introduce how to query Oracle user permissions.

1. Statements for querying user permissions

In Oracle, we can use the following statements to query user permissions:

SELECT * FROM DBA_TAB_PRIVS WHERE GRANTEE='用户名';
SELECT * FROM DBA_SYS_PRIVS WHERE GRANTEE='用户名';
SELECT * FROM DBA_ROLE_PRIVS WHERE GRANTEE='用户名';

In the above statements, respectively The user's permissions at the table level, system level and role level were queried.

2. Query the user's table-level permissions

In Oracle, users can have different permissions on tables, such as SELECT, INSERT, UPDATE, DELETE, REFERENCES, etc. . The following are some common statements to query a user's permissions at the table level:

Query a user's permissions on all tables:

SELECT OWNER,TABLE_NAME,GRANTOR,PRIVILEGE,GRANTABLE 
FROM DBA_TAB_PRIVS
WHERE GRANTEE=‘用户名’;

Query a user's permissions on a specified table:

SELECT OWNER,TABLE_NAME,GRANTOR,PRIVILEGE,GRANTABLE 
FROM DBA_TAB_PRIVS 
WHERE GRANTE=‘用户名’ AND TABLE_NAME=‘表名’;

Query all permissions owned by the user:

SELECT OWNER, TABLE_NAME, COLUMN_NAME, PRIVILEGE 
FROM DBA_COL_PRIVS 
WHERE GRANTEE=‘用户名’;

Query the user's permissions on the view:

SELECT OWNER, VIEW_NAME, GRANTOR, PRIVILEGE, GRANTABLE 
FROM DBA_TAB_PRIVS 
WHERE GRANTEE=‘用户名’ AND TABLE_NAME=‘视图名’;

With the above statement, we can query the user's different permissions on tables and views.

3. Query the user's system-level permissions

In Oracle, system-level permissions refer to system-level operations that users can perform, such as CREATE SESSION, CREATE PROCEDURE, and CREATE TABLE and so on. The following are some common statements for querying a user's system-level permissions:

Query all system-level permissions owned by a user:

SELECT GRANTEE,PRIVILEGE,ADMIN_OPTION
FROM DBA_SYS_PRIVS 
WHERE GRANTEE=‘用户名’;

Query a user's specific system-level permissions:

SELECT * FROM SESSION_PRIVS
WHERE PRIVILEGE IN (‘CREATE TABLE’, ‘CREATE PROCEDURE’, ‘CREATE SESSION’);

Through the above statements, we can query the different permissions of users at the system level.

4. Query the user's permissions at the role level

In Oracle, a role is a set of permissions, and users can be authorized by adding them to the role. The following are some common statements to query the user's permissions at the role level:

Query all roles the user is in:

SELECT GRANTEE, GRANTED_ROLE 
FROM DBA_ROLE_PRIVS 
WHERE GRANTEE=‘用户名’;

Query the permissions the user has in the role:

SELECT * 
FROM ROLE_TAB_PRIVS 
WHERE ROLE=‘角色名’ AND OWNER=‘用户所属的模式名’;

Through the above statements, we can query the different permissions of users at the role level.

5. Summary

This article introduces how to query user permissions in Oracle. When we need to ensure the correctness of user permissions, we can use the above query statement to view the user's permissions. If the user's permissions are insufficient, the user's needs can be met by granting the user more permissions. At the same time, administrators should also regularly review user permissions to ensure the security and integrity of the system.

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