docs/versioned_docs/version-2.50.0-LTS/data-sources/mssql.md
ToolJet can connect to MS SQL Server & Azure SQL databases to read and write data.
<div style={{paddingTop:'24px'}}>To establish a connection with the MS SQL Server data source, click on the + Add new Data source button located on the query panel or navigate to the Data Sources page from the ToolJet dashboard.
:::info Please make sure the Host/IP of the database is accessible from your VPC if you have self-hosted ToolJet. If you are using ToolJet cloud, please whitelist our IP. :::
ToolJet requires the following to connect to your PostgreSQL database.
Note: It is recommended to create a new database user so that you can control the access levels of ToolJet.
</div> <div style={{paddingTop:'24px'}}>Once the SQL data source is added, you can create queries to read and write data to the database. You can create queries from the Query Panel located at the bottom panel of the app builder.
SQL mode can be used to query MS SQL Server / Azure SQL Databases using SQL queries.
SELECT * FROM users
GUI mode can be used to query MS SQL Server / Azure SQL Databases without writing queries.
{{ [ {id: 1, channel: 33}, {id: 2, channel: 24} ] }}
:::tip Query results can be transformed using transformations. Read our transformations documentation to see how: link :::
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