Figure 4 shows a T-SQL statement that converts the results from our fictitious Fruit Sales data mart into JSON. In this mode, the structure of the JSON output is determined by a combination of the order of columns in your SELECT statement as well as the tables that are referenced by the SELECT statement. This is the simplest way to convert relational data into a JSON format as all that you have to do is to add FOR JSON AUTO clause at the end of your SELECT statement.
There are two ways that relational results can be converted into JSON, namely, the AUTO and PATH options.
As can be seen in Figure 3, the JSON output from Figure 2 is now properly formatted. For the purposes of this discussion, I will be using JSONFormatter from. It is therefore advisable that whilst you teach yourself JSON in SQL Server that you find yourself a JSON editor. Varbinary, binary, image, timestamp, rowversionĪlthough SQL Server’s support for XML allowed for graphical representation of the data via an editor (shown in Figure 1), attempting to view JSON data via an editor may be frustrating as JSON data is shown as an unformatted single row. SQL Server data stored in the following data types cannot be converted into JSON:Ī breakdown of supported data types is shown in Table1 SQL Server Data TypeĬhar, nchar, varchar, nvarchar, date, datetime, datetime2, time, datetimeoffset, uniqueidentifier, money Thus, it is important that we take note of the supported data types. Like many of the features in SQL Server, there are terms and conditions to using them and JSON is no different. Due to their advantages, many Node.js core modules provide native stream handling capabilities, most notably: process.stdin returns a stream connected to stdin process.stdout returns a stream connected to stdout process.stderr returns a stream connected to stderr fs.createReadStream() creates a readable stream to a file fs. In this article we take a look at how such a requirement can be implemented by data teams using SQL Server 2016 FOR JSON clause SQL Server to JSON Supported Data Types Typically, it will be an application or a document that must be opened. reporting tools, web services etc.) in a JSON format. A MIME attachment with the content type 'application/octet-stream' is a binary file. The increased popularity of JSON in modern web applications may create a requirement for data teams to expose some of their data to client applications (i.e. Require(‘http’).In my article, Warehousing JSON Formatted Data in SQL Server 2016, we had a look at available T-SQL options for converting JSON data into rows and columns for the purposes of populating a SQL Server based data warehouse. You need to know the exact URL of the resource you’d like to delete.Īn example DELETE request looks like this: DELETE /derivativeservice/v2/registration/) No matter how many times I send the request, I will only have one resource that contains "some text string" with the URI /oss/v1/buckets/shiyas-bucket-100/objects/sometext.txt.ĭELETE is what it sounds like, deleting a resource from the requested server. Notice how the URI on the first line points to the exact location of the resource. PUT is similar to POST but idempotent, which means no matter how many times you send the request the result will be the same.Īn example PUT request looks like this: PUT /oss/v1/buckets/shiyas-bucket-100/objects/sometext.txt HTTP/1.1 Data can usually be a string or a data stream, which means it’s a file.Īn example POST request looks like this: POST /authentication/v1/authenticate HTTP/1.1Ĭontent-Type: application/x-www-form-urlencodedĬlient_id=my_client_id&client_secret=my_client_secret&grant_type=client_credentials POST is a request with headers and/or data. A GET request doesn’t change anything on the requested server.Īn example GET request looks like this: GET /viewingservice/v1/supported HTTP/1.1Īuthorization: Bearer OM0GTVs3ycQ0nkU9X9cneBnInOuE
Without the headers it’s just like typing an address in your server. There are some common headers, like authorization. GET is just the URL with or without headers. If you’re sending REST API requests to a server, the documentation will(should) point you to exactly what the request is and how a sample request looks like. The type of request determines the type of operation the request sender would like the server to perform. The four most common HTTP requests are GET, POST, PUT, DELETE. HTTP/HTTPS requests in a very brief glance I’m going to demonstrate with Node’s own http.request(options) method. Node contains a bunch of native function for that, making it very easy to send REST requests.
It’s actually incredibly easy to send http/https requests to servers with Node.js.
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