In SQLite you can just do sqlite> .import myfile.csv mytable sqlite> select ... What does this tool give you that SQLite doesn't do out of the box?
As a command-line tool it could serve as a more powerful replacement for unix utilities that I often use for simple analysis jobs: sort, uniq, wc, awk, sometimes cut and sed. I'm going to give it a try.
It looks like textql loads everything into an in-memory SQLite instance, whereas I'd really like to see an approach that uses the SQLite's virtual table mechanism (https://sqlite.org/vtab.html), which would avoid the loading step and perhaps make streaming processing possible.