Question

我正在尝试将嵌套的JSON连接到SQL中，该怎么做。

请帮助我解决这个问题。

示例：我的JSON如下所示。

    [
  {
    "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": []
  }
]

我要输出：

Pack of 24 Dare Cards-12 Willy Shot Glass and 12 Hen Boppers

Answer 1

如果Value始终包含一个元素

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]')

支持多个值也很容易。

SELECT STRING_AGG(Val, '-')
FROM OPENJSON(@JSON)
WITH (VALUE NVARCHAR(MAX) '$.Value' AS JSON)
OUTER APPLY OPENJSON(VALUE) WITH (Val NVARCHAR(MAX) '$')

Answer 2

我通过创建一个标量值函数来填充级联值来实现这一目标。

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

调用具有嵌套JSON值的函数，即

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

这对我有用。

在SQL Server中串联嵌套的JSON

2 个答案: