How do I replicate PostgreSQL data to MotherDuck?

Sign up for Weld, connect PostgreSQL as a source and MotherDuck as a destination. Weld handles the extraction, loading, and lets you transform data using SQL or dbt.

What PostgreSQL data can I replicate to MotherDuck?

You can replicate the objects the PostgreSQL connector exposes. The available objects depend on your PostgreSQL account permissions and configuration.

How often does Weld replicate data from PostgreSQL?

Sync frequency depends on your Weld plan. Schedules range from every 5 minutes to daily intervals. Each sync processes only new and changed data.

Can I transform PostgreSQL data before it lands in MotherDuck?

Yes. Weld supports SQL-based transformations in the platform and integrates with dbt Cloud. You can clean, join, and model your data before analysis.

Is the PostgreSQL to MotherDuck integration secure?

Yes. Weld encrypts all data in transit and at rest, is SOC 2 Type II certified, and supports IP whitelisting. Credentials are stored encrypted and never logged.

PostgreSQL to MotherDuck integration

Replicate your PostgreSQL data into MotherDuck with Weld. Automatically replicate the tables you choose from PostgreSQL into MotherDuck, keeping your analytics layer up to date and ready for querying.

Start for free View setup guide

4.8 on G2

Source

Weld

Warehouse

Weld · New sync

SourcePostgreSQLConnected

Tables to sync

Your own tables, picked when you set up the sync.

Extract
Load
Keep in sync

DestinationMotherDuckReady

postgresql schema

postgresql.Synced
postgresql.Syncing
postgresql.Synced
postgresql.Synced

Trusted by data and AI teams

How it works

How to set up PostgreSQL to MotherDuck in Weld.
In the app, with the API or an agent.

Setup guide API guide MCP docs

Weld · Data warehouse

Data warehouseMotherDuckConnected

Data locationChosen when you connect

CredentialsService account or key, stored encrypted

Use cases

Why replicate PostgreSQL to MotherDuck?
Ready for analysis.

Centralizing your PostgreSQL data in MotherDuck lets you join it with other data sources for cross-platform analytics and deeper insights.

Build reliable dashboards and reports by querying PostgreSQL data directly in MotherDuck using SQL or your preferred BI tool.

Consolidate data from PostgreSQL alongside other databases and applications in a single database for a unified analytical layer.

Database replication for analytics
Replicate your PostgreSQL production data to MotherDuck without impacting database performance. Query historical data without load on your primary database.
Centralized data warehouse
Bring PostgreSQL data into MotherDuck alongside other sources to create a single source of truth for your organization.
Automated reporting
Replace manual exports and spreadsheet-based reporting with automated pipelines from PostgreSQL to MotherDuck. Connect BI tools like Looker, Metabase, or Power BI.

Data

What data can you replicate?
From PostgreSQL to MotherDuck.

Weld syncs the objects the PostgreSQL connector exposes into MotherDuck, and you choose which tables and fields to include. The connector's docs list what is available.

Weld MCP server

Ask your agent.
It queries MotherDuck for you.

Connect Claude, Cursor, ChatGPT or your own agent to Weld over MCP. It reads the PostgreSQL context, finds the tables it needs and runs the query in MotherDuck.

Set up the MCP server

Claude CodeOpus 5

ConnectedWeld MCP

Which PostgreSQL tables do we have in MotherDuck, and which is the largest?

Looking up what Weld has synced from PostgreSQL.

●weld·search_available_references

⎿raw.postgresql.*

tables, columns and freshness

●weld·get_reference_schema

⎿columns, types and nullability

●weld·run_query

⎿select count(*) from {{raw.postgresql.…}}

submitted

●weld·get_query_status

⎿DONE

●weld·get_query_result

⎿rows returned

✓Answered from PostgreSQL data in MotherDuck

>Ask about your PostgreSQL dataMCP

Under the hood

Technical considerations.
What to expect.

Incremental syncing: Weld uses incremental syncing where supported by the PostgreSQL API, loading only new and updated records to minimize data transfer and warehouse costs.
Change data capture: For PostgreSQL, Weld can use log-based replication (CDC) to capture inserts, updates, and deletes without querying the entire table on every sync.
Schema handling: Weld automatically manages schema changes. If PostgreSQL adds new fields, they're detected and added to the corresponding MotherDuck tables.
Data freshness: Sync frequency depends on your Weld plan. Most connectors support schedules from every 5 minutes up to daily intervals.
Security: All data is encrypted in transit (TLS) and at rest. Weld is SOC 2 Type II compliant and supports IP whitelisting for database connections.

Resources

Keep reading.
Guides, docs and schema.

Documentation

PostgreSQL setup guide

How to connect PostgreSQL to Weld, step by step.

Documentation

MotherDuck setup guide

How to connect MotherDuck to Weld, step by step.

Connector

PostgreSQL connector

Everything Weld does with PostgreSQL.

Connector

MotherDuck connector

Everything Weld does with MotherDuck.

FAQ

Common questions.
About PostgreSQL to MotherDuck.

Start syncing PostgreSQL to MotherDuck.

Set up your PostgreSQL data pipeline in minutes. No credit card required. Free for 14 days.

Source

Weld

Warehouse

Start for free Talk to us

Related integrations.
More with PostgreSQL and MotherDuck.

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PostgreSQL to MotherDuck integration

How to set up PostgreSQL to MotherDuck in Weld.In the app, with the API or an agent.

Why replicate PostgreSQL to MotherDuck?Ready for analysis.

Database replication for analytics

Centralized data warehouse

Automated reporting

What data can you replicate?From PostgreSQL to MotherDuck.

Ask your agent.It queries MotherDuck for you.

Technical considerations.What to expect.

Keep reading.Guides, docs and schema.

Common questions.About PostgreSQL to MotherDuck.