Hi Matteo Colli,
Welcome to Microsoft Q&A Forum and thanks for posting your query.
My uderstanding is that you are using Copy activity and would like to skip few lines and map rest of the data to your sink. Please let me know if my understanding is incorrect.
If you would like to read CSV from a specific line in your copy activity, then in copy activity you can use the skipLineCount
property in the TextFormat of your dataset. This property allows you to specify the number of rows to skip when reading data from input files.
Ref Doc: Copy activity properties
Hope this info helps.
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