Declare @JSON varchar(max)
SELECT @JSON=BulkColumn
FROM OPENROWSET (BULK 'path to json file', SINGLE_CLOB) import
-- E.g Path: C:UsersxxxDownloadsData.json
INSERT INTO Person (id, name, surname, age, dateOfBirth)
SELECT id, firstNAme, lastName, age, dateOfBirth
FROM OPENJSON(@json)
WITH (id int,
firstName nvarchar(50), lastName nvarchar(50),
age int, dateOfBirth datetime2)