Extracting data from extremely large csv files

by abigfatcat   Last Updated June 13, 2019 03:06 AM

I have a 40gb csv file with over 60 million rows for data analysis. Each row has a unique identifier (some numbers). For example, the first row's unique identifier will repeat approximately 150,000 rows later.

I would like to have a method to run through the entire file, and extract rows with the same identifier and write them into new csv files. Is there a good, automated way to do that? Please note that the file is very large and excel has problems opening it.

Tags : csv excel

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