Update 00-mysql.md

Author: BohuTANG

docs/doc/11-integrations/30-access-tool/00-mysql.md

@@ -29,18 +29,10 @@ mysql -h127.0.0.1 -uroot -P3307
 
 There are four built-in accounts in Databend that can be accessed from a local machine without requiring a password. These accounts are immutable and possess the highest level of privileges, meaning their settings cannot be altered or removed. Additionally, it is not possible to change or update their passwords.
 
-- [email protected]
-- root@localhost
-- [email protected]
-- default@localhost
-
-## Default SQL Dialect
-
-If you have logged into Databend through the MySQL protocol, it is important to note that the default SQL dialect is `PostgreSQL`. If you wish to use `MySQL`, change it by executing the following command:
-
-```sql
-set global sql_dialect='MySQL'
-```
+- `[email protected]`
+- `root@localhost`
+- `[email protected]`
+- `default@localhost`
 
 ## Example: Connect from DBeaver
 
@@ -71,4 +63,4 @@ GRANT ALL ON *.* TO user1;
 <img src="https://datafuse-1253727613.cos.ap-hongkong.myqcloud.com/integration/ingegration-dbeaver-connection-2.png" width="500"/>
 </p>
 
-4. Click **Test Connection...** to see if the connection works.
+4. Click **Test Connection...** to see if the connection works.