Whenever the user initiates the hardware operations, the application will call this daemon to run those operations. Created a simple daemon file and called it from a.js file. When the application runs, it asks for a password also. But.js was not able to survive on its own. As soon as it is started by launched, it will execute and exit. We want to create a daemon in such a way that runs quietly in the background, usually for a long time. We tried with sudo-prompt, but the. In this section, you will get SQL Server 2017 running on Docker. After that, you will install the necessary dependencies to create Node.js apps with SQL Server locally on your Mac. Step 1.1 Install SQL Server. In order to run SQL Server on your Mac, we are going to use the SQL Server on Linux Docker Image. For this, you need to install Docker. $ docker run -it -rm -name dev -v $(pwd):/code node-dev-image bash. You will be presented with a bash command prompt. Now, inside the container we can create a JavaScript file and run it with Node.js. Run the following commands to test our image. $ cat index.js console.log( 'Hello from inside our container' ) EOF $ node index.js.
In this section you will create three simple Node.js apps. One of them will just connect to the database, the second will perform basic Insert, Update, Delete, and Select, and the third one will make use of Sequelize, one of the most popular Node.js Object-relational mappers, to execute the same operations.
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![Running Node.js App On Mac Running Node.js App On Mac](/uploads/1/3/3/2/133279106/436037314.png)
Step 2.1 Create a Node.js app that connects to SQL Server and executes queries
Create a new project directory and initialize Node dependencies.
Create a database that will be used for the rest of this tutorial by connecting to SQL Server using sqlcmd and executing the following statement. Writing editor app mac.
![Running Node.js App On Mac Running Node.js App On Mac](/uploads/1/3/3/2/133279106/466237979.png)
Now you will create a simple Node.js app that connects to SQL Server.
Using your favorite editor, create a file named connect.js in the SqlServerSample folder. Copy and paste the below contents into the file.
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Using your favorite text editor, create a file called CreateTestData.sql in the SqlServerSample folder. Copy and paste the following the T-SQL code inside it. This will create a schema, table, and insert a few rows.
Connect to the database using sqlcmd and run the SQL script to create the schema, table, and insert some rows.
Using your favorite text editor, create a new file called crud.js in the SqlServerSample folder. Copy and paste the following code inside it. This will insert, update, delete, and read a few rows.
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Run the crud.js app to see the results
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Step 2.2 Create a Node.js app that connects to SQL Server using the popular Sequelize ORM
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Create the app directory and initialize Node dependencies.
- Open your favourite text editor and create the file orm.js in the directory SqlServerSequelizeSample.
- Paste the contents below into orm.js
- Update the variable for password to use your own password specified in the first module.
- Save and close orm.js
Run the orm.js app
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Congratulations! You created your first two Node.js apps with SQL Server! Check out the next section to learn about how you can make your Node.js apps faster with SQL Server’s Columnstore feature