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1.2 KiB
1.2 KiB
Columnq
Easy to use library and CLI to help you query tabular data with support for a rich set of growing formats data sources.
Usage
Show schemas for a specific table:
columnq(sql)> show columns from uk_cities;
+---------------+--------------+------------+-------------+-----------+-------------+
| table_catalog | table_schema | table_name | column_name | data_type | is_nullable |
+---------------+--------------+------------+-------------+-----------+-------------+
| datafusion | public | uk_cities | city | Utf8 | NO |
| datafusion | public | uk_cities | lat | Float64 | NO |
| datafusion | public | uk_cities | lng | Float64 | NO |
+---------------+--------------+------------+-------------+-----------+-------------+
The Columnq CLI can also be used as a handy utility to Convert tabular data
between various formats: json, parquet, csv, yaml, arrow, etc.
$ columnq sql --table 't=test_data/uk_cities_with_headers.csv' 'SELECT * FROM t' --output json
$ cat test_data/blogs.parquet | columnq sql --table 't=stdin,format=parquet' 'SELECT * FROM t' --output json