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Include Null Values in JSON - INCLUDE_NULL_VALUES Option

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Applies to: SQL Server 2016 (13.x) and later versions Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics (serverless SQL pool only) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric

To include null values in the JSON output of the FOR JSON clause, specify the INCLUDE_NULL_VALUES option.

If you don't specify the INCLUDE_NULL_VALUES option, the JSON output doesn't include properties for values that are null in the query results.

Examples

The following example shows the output of the FOR JSON clause with and without the INCLUDE_NULL_VALUES option.

Without the INCLUDE_NULL_VALUES option With the INCLUDE_NULL_VALUES option
{ "name": "John", "surname": "Doe" } { "name": "John", "surname": "Doe", "age": null, "phone": null }

Here's another example of a FOR JSON clause with the INCLUDE_NULL_VALUES option.

Query

SELECT name, surname  
FROM emp  
FOR JSON AUTO, INCLUDE_NULL_VALUES

Result

[{
    "name": "John",
    "surname": null
}, {
    "name": "Jane",
    "surname": "Doe"
}]

Learn more about JSON in the SQL Database Engine

For a visual introduction to the built-in JSON support in SQL Server and Azure SQL Database, see the following videos:

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