Query MongoDB Data through ODBC in Node.js

Node.js is a JavaScript runtime environment that allows you to run JavaScript code outside of a browser. With the CData ODBC Driver for MongoDB, you can access live MongoDB data from Node.js apps and scripts. In this article, we walk through installing node-odbc and the required tools to create a simple Node.js app with access to live MongoDB data.

With built-in optimized data processing, the CData ODBC Driver offers unmatched performance for interacting with live MongoDB data in Node.js. When you issue complex SQL queries from Node.js to MongoDB, the driver pushes supported SQL operations, like filters and aggregations, directly to MongoDB and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations).

Connecting to MongoDB Data

If you have not already done so, provide values for the required connection properties in the data source name (DSN). You can use the built-in Microsoft ODBC Data Source Administrator to configure the DSN. This is also the last step of the driver installation. See the "Getting Started" chapter in the help documentation for a guide to using the Microsoft ODBC Data Source Administrator to create and configure a DSN.

Set the Server, Database, User, and Password connection properties to connect to MongoDB. To access MongoDB collections as tables you can use automatic schema discovery or write your own schema definitions. Schemas are defined in .rsd files, which have a simple format. You can also execute free-form queries that are not tied to the schema.

Building node-odbc

In order to connect to MongoDB through the CData ODBC Driver, you need to build node-odbc manually (after installing the required tools).

Installing the Required Tools

The following commands install the tools required to build node-odbc (note the -g parameter, which installs the tools globally).

npm i -g windows-build-tools
npm i -g node-gyp

Building node-odbc

After installing the required tools, create a directory for the Node.js app and install odbc (which builds the binary for us to use in our Node.js script).

mkdir nodeodbc
cd nodeodbc
npm i -g node

Querying MongoDB from Node.js

With the ODBC Driver installed, a DSN Configured, and node-odbc built, we are ready to query live MongoDB data from a Node.js app. The sample code below connects to a specific DSN and queries the restaurants table.

myscript.js

const odbc = require('odbc');

async function queryMongoDB() {
    const connection = await odbc.connect(`DSN=CData MongoDB Source`);
    const data = await connection.query('SELECT borough, cuisine FROM restaurants');
    console.log(data);
}

queryMongoDB();

Once you write the app, use node to execute the script:

node myscript.js

Download a free, 30-day trial of the CData ODBC Driver for MongoDB and start working with your live MongoDB data in Node.js. Reach out to our Support Team if you have any questions.