If you spin up azure databricks workloads (VM instance) then there is a charges.
Azure Databricks bills* you for virtual machines (VMs) provisioned in clusters and Databricks Units (DBUs) based on the VM instance selected. A DBU is a unit of processing capability, billed on a per-second usage. The DBU consumption depends on the size and type of instance running Azure Databricks.
refer - https://azure.microsoft.com/en-us/pricing/details/databricks/
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