json-path-exists-transact-sql.md

title	JSON_PATH_EXISTS (Transact-SQL)
description	JSON_PATH_EXISTS (Transact-SQL)
author	uc-msft
ms.author	umajay
ms.date	4/26/2022
ms.prod	sql
ms.technology	t-sql
ms.topic	reference
ms.custom	event-tier1-build-2022
dev_langs	TSQL
monikerRange	= azuresqldb-current || = azure-sqldw-latest || >= sql-server-ver16 || >= sql-server-linux-ver16

JSON_PATH_EXISTS (Transact-SQL)

[!INCLUDE sqlserver2022-asdb-asmi]

Tests whether a specified SQL/JSON path exists in the input JSON string.

Syntax

JSON_PATH_EXISTS( value_expression, sql_json_path )  

Arguments

value_expression Is a character expression.

sql_json_path Is a valid SQL/JSON path to test in the input.

Return value

Returns a bit value of 1 or 0 or NULL. Returns NULL if the value_expression or input is a SQL null value. Returns 1 if the given SQL/JSON path exists in the input or returns a non-empty sequence. Returns 0 otherwise.

The JSON_PATH_EXISTS function does not return errors.

Examples

Example 1

The following example returns 1 since the input JSON string contains the specified SQL/JSON path.

DECLARE @jsonInfo NVARCHAR(MAX)

SET @jsonInfo=N'{"info":{"address":[{"town":"Paris"},{"town":"London"}]}}';

SELECT JSON_PATH_EXISTS(@jsonInfo,'$.info.address'); -- 1

Example 2

The following example returns 0 since the input JSON string contains the specified SQL/JSON path.

DECLARE @jsonInfo NVARCHAR(MAX)

SET @jsonInfo=N'{"info":{"address":[{"town":"Paris"},{"town":"London"}]}}';

SELECT JSON_PATH_EXISTS(@jsonInfo,'$.info.addresses'); -- 0 

See also

JSON Data (SQL Server)