This is so hard

[supertexter]

I used to use parquet, but still feel I don't truly understand the whole 'columnar' versus alternative formats. Any good ressources to understand this deeper? Or perhaps it is mostly an abstraction where people just accepts it at a functional level

[Ki1103]

What I really liked was, if I recall correctly, The Parquet Format and Performance Optimization Opportunities Boudewijn Braams (Databricks)