Azure Synapse Analytics SQL pool supports various data loading methods. The fastest and most scalable way to load data is through PolyBase. PolyBase is a data virtualization technology that can access external data stored in Hadoop or Azure Data Lake Storage via the T-SQL language.

PolyBase shifts the data loading paradigm from ETL to ELT. The data is first loaded into a staging table followed by the transformation steps and finally loaded into the production tables.

In this article, we load a CSV file from an Azure Data Lake Storage Gen2 account to an Azure Synapse Analytics data warehouse by using PolyBase. We will look at the detailed steps to carry out the loading procedure.

#t-sql #csv-import #azure-synapse-analytics #polybase #external-tables