Hi @Satoshi
As far as I know, Synapse Analytics does not support the data format of excel, and we cannot import excel files into Synapse Analytics.
For how to import data into Synapse Analytics, you can refer to the following article:
https://learn.microsoft.com/en-us/learn/modules/import-data-into-asdw-with-polybase/
https://learn.microsoft.com/en-us/azure/data-factory/connector-azure-sql-data-warehouse
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