Examples of Built-In JSON Support in SQL Server and Azure SQL Database
Below we are going to see some examples of utilizing SQL Server’s JSON support.
For the purposes of these demos, I have created a sample tabled called “Students” and I have populated it with random data. Let’s take a look at the first 10 rows of this table:
Example 1: The “FOR JSON AUTO” Clause
In order to extract data from a table and represent it in the JSON format you must use wither the “FOR JSON AUTO” clause or the “FOR JSON PATH” clause.
The “FOR JSON AUTO” clause allows you to have full control over the format of the JSON output. For example, you can specify the root.
Example 2: The “FOR JSON PATH” clause
The “FOR JSON PATH” clause automatically formats the JSON output based on the structure of the source table.
Example 3: The OPENJSON rowset function
Now, if you want to transform JSON data into a tabular form, you can use the OPENJSON rowset function.
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- MSDN Library Article: Format Query Results as JSON with FOR JSON (SQL Server)
- MSDN Library Article: Convert JSON Data to Rows and Columns with OPENJSON (SQL Server)
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- SQL Server 2016: Built-In JSON Support
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Reference: SQLNetHub.com (https://www.sqlnethub.com)