https://github.com/johnkerl/miller https://github.com/johnkerl/miller Miller (mlr) is now my goto tool for csv/tsv manipulation. I've used it from time to time

https://github.com/johnkerl/miller https://github.com/johnkerl/miller Miller (mlr) is now my goto tool for csv/tsv manipulation. I've used it from time to time during the past year and it's been a joy to use. I must admit that I did not try any other tool for the purpose so I don't know how it compares. It has a nice verb system, verbs can be combined with "then" statements : https://johnkerl.org/miller/doc/reference-verbs.html https://johnkerl.org/miller/doc/reference-verbs.html . There is also a small DSL to use with the "put" and "filter" verbs: https://johnkerl.org/miller/doc/reference-dsl.html https://johnkerl.org/miller/doc/reference-dsl.html . Another verb I find very useful is "join", which does pretty much what you would expect it to do.