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Re:Q: Run SQL Directly on CSV Files by ashrk on Wednesday November 14, 2018 @04:48PM (#18454351)
Looks like PostgreSQL has a foreign data wrapper for CSV.

https://wiki.postgresql.org/wiki/Foreign_data_wrappers

In fact, seems it has several.

Re:Q: Run SQL Directly on CSV Files by garyclarke27 on Thursday November 15, 2018 @03:11AM (#18457677)
Yes Also trivially easy and lightning fast to import csv to table using copy command in Postgres.