I haven't tried this but just found below documentation which says - KQL Query result can be exported to Azure SQL
.export async to sql MySqlTable
h@"Server=tcp:myserver.database.windows.net,1433;Database=MyDatabase;Authentication=Active Directory Integrated;Connection Timeout=30;"
<| print Id="d3b68d12-cbd3-428b-807f-2c740f561989", Name="YSO4", DateOfBirth=datetime(2017-10-15)
Another option is to try create pipeline in Azure data factory - copy data from ADX table to SQL table (staging) and run SQL Procedure to insert/update to final table
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Please don't forget to Accept Answer and Up-vote if the response helped -- Vaibhav