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MySQL to Microsoft SQL Server integration

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

Start for freeView setup guide
4.8 on G2
MySQLSource
WeldWeld
Microsoft SQL ServerWarehouse
Weld · New sync
MySQLSourceMySQLConnected
Tables to sync

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

  • Extract
  • Load
  • Keep in sync
Microsoft SQL ServerDestinationMicrosoft SQL ServerReady
mysql schema
  • mysql.Synced
  • mysql.Syncing
  • mysql.Synced
  • mysql.Synced

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How it works

How to set up MySQL to Microsoft SQL Server in Weld.
In the app, with the API or an agent.

Setup guideAPI guideMCP docs
Weld · New MySQL sync
MySQLNew connectionMySQLAuthorised
Connection namemysql
AuthorizeOpens MySQL to grant read access
Use cases

Why replicate MySQL to Microsoft SQL Server?
Ready for analysis.

Centralizing your MySQL data in Microsoft SQL Server lets you join it with other data sources for cross-platform analytics and deeper insights.

Build reliable dashboards and reports by querying MySQL data directly in Microsoft SQL Server using SQL or your preferred BI tool.

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

  • Database replication for analytics

    Replicate your MySQL production data to Microsoft SQL Server without impacting database performance. Query historical data without load on your primary database.

  • Centralized data warehouse

    Bring MySQL data into Microsoft SQL Server 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 MySQL to Microsoft SQL Server. Connect BI tools like Looker, Metabase, or Power BI.

Data

What data can you replicate?
From MySQL to Microsoft SQL Server.

Weld syncs the objects the MySQL connector exposes into Microsoft SQL Server, 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 Microsoft SQL Server for you.

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

    Set up the MCP serverClaudeCursorChatGPTGemini
    Claude CodeOpus 5
    >

    Which MySQL tables do we have in Microsoft SQL Server, and which is the largest?

    Looking up what Weld has synced from MySQL.

    ●weld·search_available_references
    ⎿raw.mysql.*
    tables, columns and freshness
    ●weld·get_reference_schema
    ⎿columns, types and nullability
    ●weld·run_query
    ⎿select count(*) from {{raw.mysql.…}}
    submitted
    ●weld·get_query_status
    ⎿DONE
    ●weld·get_query_result
    ⎿rows returned
    ✓Answered from MySQL data in Microsoft SQL Server
    >Ask about your MySQL data
    Under the hood

    Technical considerations.
    What to expect.

    Incremental syncing
    Weld uses incremental syncing where supported by the MySQL API, loading only new and updated records to minimize data transfer and warehouse costs.
    Change data capture
    For MySQL, 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 MySQL adds new fields, they're detected and added to the corresponding Microsoft SQL Server 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

    MySQL setup guide

    How to connect MySQL to Weld, step by step.

    Documentation

    Microsoft SQL Server setup guide

    How to connect Microsoft SQL Server to Weld, step by step.

    Connector

    MySQL connector

    Everything Weld does with MySQL.

    Connector

    Microsoft SQL Server connector

    Everything Weld does with Microsoft SQL Server.

    FAQ

    Common questions.
    About MySQL to Microsoft SQL Server.

    Start syncing MySQL to Microsoft SQL Server.

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

    MySQLSource
    WeldWeld
    Microsoft SQL ServerWarehouse
    Start for freeTalk to us
    Related

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    More with MySQL and Microsoft SQL Server.

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