Concatenate nested JSON in SQL Server - sql

Question

I am trying to concatenate nested JSON in SQL, how to do that.
Please help me out with this.
Example: I have JSON Like below.
[
{
"Name": "Cards",
"Value": [
"Pack of 24 Dare Cards"
],
"SourceSpecified": false,
"Any": []
},
{
"Name": "Boppers and Shot Glasses",
"Value": [
"12 Willy Shot Glass and 12 Hen Boppers"
],
"SourceSpecified": false,
"Any": []
}
]
I want Out Put:
Pack of 24 Dare Cards-12 Willy Shot Glass and 12 Hen Boppers

Answer 1

If Value always contains one element
DECLARE #JSON NVARCHAR(MAX) = ' [
{
"Name": "Cards",
"Value": [
"Pack of 24 Dare Cards"
],
"SourceSpecified": false,
"Any": []
},
{
"Name": "Boppers and Shot Glasses",
"Value": [
"12 Willy Shot Glass and 12 Hen Boppers"
],
"SourceSpecified": false,
"Any": []
}
]'
SELECT STRING_AGG(Val, '-')
FROM OPENJSON(#JSON)
WITH (Val NVARCHAR(MAX) '$.Value[0]')
Support of multiple values is also easy.
SELECT STRING_AGG(Val, '-')
FROM OPENJSON(#JSON)
WITH (VALUE NVARCHAR(MAX) '$.Value' AS JSON)
OUTER APPLY OPENJSON(VALUE) WITH (Val NVARCHAR(MAX) '$')

Answer 2

This one I achieved with creating a scalar-valued function to populate concatenated value.
Create FUNCTION [dbo].[test]
(
#VariationData nvarchar(max)
)
RETURNS nvarchar(max)
AS
BEGIN
Declare #val nvarchar(max)
select #val = COALESCE(#val+', ','')+ Value from OPENJSON(#VariationData)
With ([Value] NVARCHAR(MAX) N'$.Value[0]')
return #val
END
Call function with nested JSON value i.e
Select [dbo].[test] (#JSON);
This worked for me.