Wow everyone seems to love P3 but I actually liked P4 better. I mean I really enjoyed both, but P4 was a more immersive experience for me. I should reboot my vita and play it again.
I really felt like P4 had deeper connections and relationships between the characters. It felt more real, and that made the tension in the game more exciting. I love every second of it and am still trying to find a game like it.
Don't get me wrong, P3 was great also. The gameplay was superb and the characters were all great. But P4 still has a special place in my heart.
Parquet is really used for big data batch data processing. It's columnar-based file format and is optimized for large, aggregation queries. It's non-human readable so you need a library like apache arrow to read/write to it.
I would use parquet in the following circumstances (or combination of circumstances):
Since the data is columnar-based, doing queries like
select sum(sales) from revenue
is much cheaper and faster if the underlying data is in parquet than csv.The big advantage of csv is that it's more portable. csv as a data file format has been around forever, so it is used in a lot of places where parquet can't be used.