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How to chop-chop create a uncomplicated REST API for SQL Server database

In IT consulting projects, we frequently have to employ an existing database. Here's how to create a simple Residual API for a database in SQL Server using Node.js and the 2 modules Limited (a Web framework for Node.js) and mssql (MS SQL Server client for Node.js). Returning results in JSON format that can easily be treated by a web application, mobile, another REST service, etc.

Server initialization

*Note: Make sure the SQL Server Browser windows service is running.

Simple Select query on the Customer table

Ex .: http://localhost:8081/customers/

Simple Select query with a where clause on the CustomerId field

Ex .: http://localhost:8081/customers/1

Execute a stored procedure with 1 parameter

Ex .: http://localhost:8081/customers/1/orders

This implementation remains minimalist. Simply with the information received in the callback, it would be piece of cake to add together logging, manage SQL errors, etc.

Yous can try this example past simply re-create the code in a file like server.js and run information technology with Node.js:

$ node server.js

And and then make the REST calls in a Web browser, a tool like Postman or, if you prefer non leaving your console, utilise curl with a control similar:
$ curl -10 GET http://localhost:8081/Customers