An Azure relational database service.
Thanks for posting your question in the Microsoft Q&A forum.
If you increase the size of a database within an Azure SQL Elastic Pool beyond the pool size limit, you will not be billed for the extra storage space used by that specific database separately from the pool. Instead, you will be billed for each hour the pool exists at the highest eDTU or vCores, regardless of usage or whether the pool was active for less than an hour.
https://learn.microsoft.com/en-us/azure/azure-sql/database/elastic-pool-overview?view=azuresql
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