Steps:
1. First open navicat for mysql.
2. Double-click the server where you want to build the database. Here we take the local localhost as an example.
3. After connecting, right-click "localhost" and select "New Database".
4. Then name the database, select the character set (usually UTF-8), and click the OK button.
5. Then you will see that the new aaa database has been created successfully.