node cookbook
N8N Postgres Node Cookbook
Use the Postgres node when a workflow needs to query, insert, update, or transform data in a PostgreSQL database.
Independent third-party notes. n8n is a trademark of its owner and is referenced only for compatibility and troubleshooting context.
Quick Answer
Use the Postgres node when a workflow needs to query, insert, update, or transform data in a PostgreSQL database.
Key Facts
- Credential type
- Postgres database connection credentials.
- Common uses
- Read operational data, write automation results, sync records, and trigger reporting workflows.
- Key setup choice
- Host, port, database, user, SSL, and query/operation mode.
- Common companion nodes
- Schedule Trigger, IF, Set, Code, HTTP Request, and Slack.
Recommended Steps
- Create credentials for a database user with appropriate permissions.
- Choose the operation or query mode.
- Use parameters or mapped values instead of unsafe string concatenation when possible.
- Test the query on a small result set.
- Add error handling for empty results and connection failures.
Verification
- The node connects to the intended database.
- Queries return only the expected rows and columns.
- Write operations can be rolled back or tested safely before production.
Warnings
- Do not use a broad admin database user for routine workflow operations.
- Large result sets can create memory pressure in n8n.