How to add a new property in json structure existing in nvarchar(max) type column in SQL Server

Question

I have data like this in an employee table in a column of type nvarchar(max) :

{
   "ID":101,
   "FirstName":"Vatan",
   "LastName":"Soni"
}

Now I need to update all rows with FullName property as well, so result should be

{
    "ID":101,
    "FirstName":"Vatan",
    "LastName":"Soni",
    "FullName":"Vatan Soni"
}

Please help and provide the SQL update script for it.

Thanks in advance.

Answer 1

Starting with SQL 2016 you have JSON types and functions: JSON_MODIFY :

UPDATE <table> 
  SET <column> = JSON_MODIFY(<column>, '$.FullName', 
  JSON_VALUE(<column>, '$.FirstName') + ' ' + JSON_VALUE(<column>, '$.LastName'))