Hey,
Below are your answers:
- Yes: You can use both of them in same workspace (that is why the concept of workspace was created to have everything together)
- Both of them have different use cases :
https://www.c-sharpcorner.com/article/dedicated-sql-pools-vs-serverless-sql-pools-in-azure-synapse-analytics/
https://www.linkedin.com/pulse/azure-synapse-serverless-pools-vs-dedicated-steve-mcpherson
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