Yes, I use q all the time for slicing and dicing delimited files. The only problem I have with it is that the name can make it a littler harder to find if you don't remember the repo.

Since q will read stdin and write CVS to stdout you can chain several queries on the command line, or use it in series with other with other commands such as cat, grep, sed, etc.

Highly recommended if you like SQL and deal with delimited files.