Qo

qo Plugin

Interactive minimalist SQL query tool for JSON and CSV files. Supports format conversion, aggregation, joins, and pipe-friendly headless output for CLI pipelines.

Commands

Queries

• qo data query — Run a SQL query on JSON or CSV data

Utility

• qo self version — Print qo version
• qo _ _ — Passthrough to qo CLI

Usage Examples

• "Query all rows from a JSON file where id > 100"
• "Convert a CSV file to JSON"
• "Aggregate sales by region from a CSV"
• "Join two JSON files on a common key"
• "Filter error logs from a JSON stream"

Installation

brew install kiki-ki/tap/qo

Examples

# Query a JSON file
qo data query -q "SELECT id, name FROM data" data.json

# Query from stdin
cat data.json | qo data query -q "SELECT id, name FROM data"

# Join two JSON files
qo data query -q "SELECT * FROM x JOIN y ON x.id = y.x_id" x.json y.json

# Aggregate CSV data
qo data query -i csv sales.csv -o csv -q "SELECT region, SUM(amount) FROM sales GROUP BY region"

# Convert JSON to CSV
qo data query -o csv data.json -q "SELECT id, name FROM data"

# Convert CSV to JSON
qo data query -i csv -o json users.csv -q "SELECT * FROM users"

# Convert JSON to JSON Lines
qo data query -o jsonl data.json -q "SELECT * FROM data"

# Query headerless CSV
qo data query -i csv --no-header raw.csv -q "SELECT col1, col2 FROM raw"

# Filter logs from stdin
cat app.log | qo data query -q "SELECT timestamp, message FROM tmp WHERE level = 'error'"

# Compress filtered output
cat large.json | qo data query -q "SELECT * FROM data WHERE active = true" | gzip > filtered.json.gz

Key Features

• SQL syntax for querying JSON and CSV data
• Supports multiple input and output formats (JSON, CSV, JSON Lines)
• Pipe-friendly: reads from stdin, writes to stdout
• Joins across multiple files
• Aggregation functions (SUM, COUNT, AVG, etc.)
• Headerless CSV support
• Interactive TUI mode (default when no query provided)
• Headless mode with -q flag for scripts and pipelines

Notes

• Use -q flag for headless non-interactive queries
• Without -q, qo launches an interactive TUI
• Input format is auto-detected; use -i to override
• Output defaults to the input format; use -o to convert
• Supports standard SQL SELECT, WHERE, GROUP BY, ORDER BY, JOIN