In my first post, How to load data into SQL Server using JSON functionality, I discussed one of the key functions of SQL Server 2016 JSON support, which is OPENJSON.
Today we will see another built in function of JSON, which is ISJSON.
ISJSON - This function is used to test whether a string contains valid JSON or not. It returns 1 if the string is valid JSON. If not, it returns 0. It returns null if the expression is null. We will check all of these return values.