updated (#1982)

Author: soyeric128

docs/en/guides/56-security/access-control/01-privileges.md

@@ -170,15 +170,16 @@ Please note that you can use the [USE DATABASE](/sql/sql-commands/ddl/database/d
 
 | Privilege | Description                                                                                                      |
 |:----------|:-----------------------------------------------------------------------------------------------------------------|
-| Alter     | Renames a database.                                                                                              |
+| ALTER     | Renames a database.                                                                                              |
 | CREATE    | Creates a database.                                                                                              |
 | DROP      | Drops or undrops a database. Restores the recent version of a dropped database.                                  |
 | SELECT    | SHOW CREATE a database.                                                                                          |
 | OWNERSHIP | Grants full control over a database.  Only a single role can hold this privilege on a specific object at a time. |
+| USAGE     | Allows entering a database using `USE <database>`, without granting access to any contained objects.             |
 
 > Note:
 >
-> 1. If a role own a database, this role can access all tables under this database.
+> 1. If a role owns a database, the role can access all the tables in the database.
  
 
 ### Session Policy Privileges

docs/en/sql-reference/10-sql-commands/00-ddl/00-database/ddl-use-database.md

@@ -2,6 +2,9 @@
 title: USE DATABASE
 sidebar_position: 3
 ---
+import FunctionDescription from '@site/src/components/FunctionDescription';
+
+<FunctionDescription description="Introduced or updated: v1.2.721"/>
 
 Selects a database for the current session. This statement allows you to specify and switch to a different database. Once you set the current database using this command, it remains the same until the end of the session unless you choose to change it.
 
@@ -11,6 +14,22 @@ Selects a database for the current session. This statement allows you to specify
 USE <database_name>
 ```
 
+## Important Notes
+
+In some cases, executing `USE <database>` can be slow—for example, when the user has ownership of only a subset of tables, and Databend needs to scan metadata to determine access rights.
+
+To improve the performance of the `USE <database>` statement—especially in databases with many tables or complex permissions—you can grant the `USAGE` privilege on the database to a role, and then assign that role to users.
+
+```sql
+-- Grant USAGE privilege on the database to a role
+GRANT USAGE ON <database_name>.* TO ROLE <role_name>;
+
+-- Assign the role to a user
+GRANT ROLE <role_name> TO <user_name>;
+```
+
+The `USAGE` privilege allows users to enter the database but does not grant visibility or access to any tables. Users still need appropriate table-level privileges such as `SELECT` or `OWNERSHIP` to see or query tables.
+
 ## Examples
 
 ```sql