JSON_PATH_EXISTS (Transact-SQL)
Applies to:
SQL Server 2022 (16.x)
Azure SQL Database
Azure SQL Managed Instance
Tests whether a specified SQL/JSON path exists in the input JSON string.
Transact-SQL syntax conventions
Syntax
JSON_PATH_EXISTS( value_expression, sql_json_path )
Arguments
value_expression
A character expression.
sql_json_path
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 doesn't 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,'$.info.address'); -- 1
Example 2
The following example returns 0 since the input JSON string doesn't contain the specified SQL/JSON path.
DECLARE @jsonInfo NVARCHAR(MAX)
SET @jsonInfo=N'{"info":{"address":[{"town":"Paris"},{"town":"London"}]}}';
SELECT JSON_PATH_EXISTS(@jsonInfo,'$.info.addresses'); -- 0