SQL Server OPENJSON read nested json

Question

I have some json that I would like to parse in SQL Server 2016. There is a hierarchy structure of Projects->Structures->Properties. I would like to write a query that pars

Answer 1

If you reference JSON object or array you need to specify AS JSON clause:

select IdProject, Name, structures
from   openjson (@json)
with
(
    IdProject uniqueidentifier,
    Name nvarchar(100),
    structures nvarchar(max) AS JSON
) as Projects

See FAQ: https://msdn.microsoft.com/en-us/library/mt631706.aspx#Anchor_6

If you want to apply OPENJSON on the returned structures array, you can use something like following code:

select IdProject, Name, structures
from   openjson (@json)
with
(
    IdProject uniqueidentifier,
    Name nvarchar(100),
    structures nvarchar(max) AS JSON
) as Projects 
     CROSS APPLY OPENJSON (structures) WITH (......)