@이중문
Thank you for the question and for using Microsoft Q&A platform.
Based on the information you provided, it seems that your MySQL Single Server has been migrated to Azure Database for MySQL Flexible Server. However, the server status is currently stopped and you are unable to access it through the Azure portal or CLI until 12 hours after migration.
To start a Flexible Server, you can follow these steps:
- Go to the Azure portal and navigate to your Azure Database for MySQL Flexible Server.
- Click on the "Start" button to start the server.
- Wait for the server to start. This may take a few minutes.
- Once the server is started, you should be able to access it through the Azure portal or CLI.
For more information you can refer to the below links:
https://learn.microsoft.com/en-us/azure/mysql/flexible-server/how-to-stop-start-server-portal
https://learn.microsoft.com/en-us/azure/mysql/flexible-server/how-to-restart-stop-start-server-cli
Hope this helps. Please let us know if you have any other questions.