在SQL Server中连接嵌套的JSON

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 value s 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 ie

Select  [dbo].[test] (@JSON);

This worked for me.