Data merging in n8n without SQL: JOIN, UNION

# Data merging in n8n: joins, filtering, and list enrichment without SQL

This template merges and enriches data from two sources using the Merge node in n8n — similar to SQL JOIN and UNION operations. Data is generated internally via code nodes. Ideal for automating structured lists like ingredients, band members, inventory, or task sets.

## Who it´s for
- Developers learning n8n and data merging operations.
- Analysts who need to filter and combine datasets without SQL.
- Integrators designing ETL processes in low-code environments.

## What the automation does
- Merges two data arrays by a key field (similar to INNER JOIN).
- Enriches records from one source with data from another (LEFT JOIN).
- Combines lists with different fields into one (UNION ALL).
- Filters results based on defined conditions.
- Outputs processed data for further use or export.

## What´s included
- Ready-to-use n8n workflow with Merge node logic.
- Trigger and data processing logic.
- Integrations using JavaScript and native n8n nodes.
- Basic text instructions for launch and adaptation.

## Requirements for setup
- n8n account (cloud or self-hosted).
- Basic understanding of JavaScript and JSON structure.
- Access to the workflow editor for node configuration.

## Benefits and outcomes
- Simplifies list processing without writing SQL queries.
- Enables testing of data merge logic in a sandboxed environment.
- Accelerates ETL prototyping in low-code.
- Reusable template across various data types (recipes, inventory, teams).
- Saves time on manual matching and filtering tasks.

## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat