Hi Hoang Viet Nguyen,
Thank you for reaching out to us on the Microsoft Q&A forum.
Just checking in to see if you have got a chance to see the answer posted by Andreas Baumgarten in resolving the issue.
As mentioned, we kindly advise reaching out to Azure Support to elaborate on the situation and seek assistance. Azure Support can offer clarification regarding the conversion of a free student trial to a paid subscription and, if applicable, revert to the free tier. They are also equipped to identify the specific service causing the high charges and propose potential solutions. You can contact Azure Support through the following link: https://azure.microsoft.com/en-us/support/.
We urge you to remove your credit card information after discontinuing unnecessary services to prevent further charges unless a paid service has been explicitly chosen.
Furthermore, we recommend exploring the following options to mitigate costs:
- Take advantage of the free trial option provided by Microsoft Azure, granting access to a broader range of services for a limited period, typically 30 days. To activate the trial, please use the following link: https://azure.microsoft.com/en-us/pricing/offers/ms-azr-0044p.
- Microsoft offers free trials for various Azure services, including Azure SQL Database. Explore the available free trial options using the following link: https://azure.microsoft.com/en-us/pricing/free-services.
- Begin with a smaller database size to reduce storage costs.
- Optimize resource usage by utilizing short-running queries in Pandas and SQL.
- Consider exploring free, open-source alternatives for Pandas functionalities if necessary. Libraries such as "PyData/pandas" https://pandas.pydata.org/) may be suitable alternatives.
If you continue to experience the issue, please do not hesitate to inform us in the comments. We are dedicated to assisting you further.
If you find the provided information helpful, we would greatly appreciate your consideration in clicking the "Accept Answer and Upvote" on the post.