Log Analytics with Azure Synapse Analytics – Bradley Schacht
While Auditing can be turned on for a database by either enabling it at the workspace or database level, diagnostics must be enabled at the database level. There are diagnostics at the workspace level, but those are different metrics and do not apply to monitoring the dedicated SQL pool.
Auditing can be enabled at the workspace level, which will cover all databases on the workspace automatically, or at the individual database level.