Sync Shopify customers to PostgreSQL with de-duplication
Intermediate Data Sync & Integration workflow for E-commerce & Retail
The Shopify trigger (customers/create) delivers the customer. A Set node maps id, email, first/last name, phone, orders_count and total_spent. A Code node computes email_key = trim+lowercase(email), the natural identity for a person, since Shopify can hold duplicate customer records with the same email in different casing. A Remove Duplicates node drops repeats within the incoming batch on email_key. A Postgres upsert then writes keyed on email_key with ON CONFLICT DO UPDATE, so the database converges to exactly one row per person and later updates merge onto it. Failures retry with backoff into a dead-letter table.
Key benefits
- ✓One row per real person, keyed on normalised email
- ✓Handles Shopify's duplicate/mixed-case customer records
- ✓Later updates merge onto the existing row, not a new one
Use cases
- →A clean customers table for CRM sync or analytics
- →De-duplicating a customer list before an email export
- →A single source of truth for lifetime spend per person
Integrations
Workflow preview (7 nodes)
The template's actual node layout and connections. Node parameters and credential slots unlock with the download.
What's inside (7 nodes)
A look at the node types this workflow uses. No purchase required — full parameters and credentials are yours after you buy.
From download to running in 3 steps
- 1Import. In n8n, open Workflows → menu → “Import from File” and pick the downloaded JSON.
- 2Connect. Add your own credentials on the app nodes - n8n highlights exactly which ones need them.
- 3Activate. Run it once to test, then toggle Active. The automation is live.
What you'll learn
Production levelProduction-grade: idempotency, dead-letter handling, and reconciliation included.
- •Structuring a workflow as trigger, validate, act, and notify
- •Adding retries and an explicit error path to every external call
- •Keeping writes idempotent so re-runs stay safe
Every node carries its own documentation on the canvas, plus notes explaining why the architecture was built this way, a credential setup guide, troubleshooting, and three practice exercises. Sample data comes pinned to the trigger, so you can hit Execute and watch data flow before connecting a single account.
Common questions
What exactly do I get?
The complete, ready-to-import n8n workflow as a JSON file, delivered instantly after payment. Import it into your own n8n (cloud or self-hosted), add your credentials, and it runs.
How do I import it into n8n?
In n8n, open Workflows, click the three-dot menu, choose “Import from File”, and select the downloaded JSON. Then connect your own app credentials on the highlighted nodes.
Do I need anything else for it to work?
You need your own n8n instance and accounts/credentials for the apps this workflow connects to (Shopify, PostgreSQL). No coding is required.
What if it doesn't work for me?
If the file is faulty, won't import, or isn't as described, contact us within 7 days and we'll fix it or refund you - see our refund policy.
Can I modify or resell it?
You can freely adapt and use it in your own or your clients' projects. Reselling or redistributing the template file itself is not permitted.
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