💾 Archived View for freeshell.de › tldr › q.gmi captured on 2023-07-10 at 14:53:24. Gemini links have been rewritten to link to archived content

View Raw

More Information

⬅️ Previous capture (2022-04-28)

-=-=-=-=-=-=-

q

Execute SQL-like queries on .csv and .tsv files.

More information.

• Query `.csv` file by specifying the delimiter as ',':

q -d',' "SELECT * from {path/to/file}"

• Query `.tsv` file:

q -t "SELECT * from {path/to/file}"

• Query file with header row:

q -d{delimiter} -H "SELECT * from {path/to/file}"

• Read data from stdin; '-' in the query represents the data from stdin:

{output} | q "select * from -"

• Join two files (aliased as `f1` and `f2` in the example) on column `c1`, a common column:

q "SELECT * FROM {path/to/file} f1 JOIN {path/to/other_file} f2 ON (f1.c1 = f2.c1)"

• Format output using an output delimiter with an output header line (note: command will output column names based on the input file header or the column aliases overridden in the query):

q -D{delimiter} -O "SELECT {column} as {alias} from {path/to/file}"

Copyright © 2014—present the tldr-pages team and contributors.

This work is licensed under the Creative Commons Attribution 4.0 International License (CC-BY).

CC-BY