Hi,
ETL -extract, transform, and load is built-In in SQL server. If the installation of your SQL was customized and the option to include the installation of such, e.g. SQL Integration services, SQL Server Analysis Services and SQL Server Reporting Services, then you could use them. An ETL tool is not related with web development and we cannot use ETL tool in asp.net.
Please see this link for further explanation:
What is ETL
Regards,
Algem