# DB Explorer > Multi-engine database explorer for querying Postgres, MySQL, and SQLite. Use when this capability is needed. - Skill: `tomevault-io/db-explorer` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/db-explorer` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/db-explorer/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/db-explorer --- # DB Explorer Skill Use this skill to perform high-intensity queries and data extraction from external databases. MagmaBot acts as an intelligent bridge, non-destructively exploring schemas and generating reports. ## Supported Engines * **PostgreSQL**: `postgresql://user:password@localhost:5432/dbname` * **MySQL**: `mysql://user:password@localhost:3306/dbname` * **SQLite**: `sqlite:///path/to/database.db` ## Usage Examples **Schema Discovery:** > "List all tables in the connected database and describe the 'users' table structure." **Data Extraction:** > "Find the top 10 most active users in the last 30 days based on the 'transactions' table." **Complex Joins:** > "Generate a report combining 'orders' and 'customers' to find high-value clients in New York." ## Advanced Capabilities * **JSON Export**: "Query the last 5 logs and return them as a JSON array." * **Safety Mode**: MagmaBot defaults to `SELECT` and `DESCRIBE` operations unless explicitly instructed to mutate data. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/fallenproud) — claim your Tome and manage your conversions.