Hi @Subhash_Malvi, "Is it possible to prepare the Saas-Sales. (Default Sample Dataset Given by Quicksight)csv Dataset without having to upload it separately? No. Please see if this post helps. Also, here is the official documentation for using Sankey.
I am marking this reply as, “Solution,” but let us know if this is not resolved. Thanks for posting your questions on the QuickSight Community!