将结果转换为双重嵌套 JSON 格式

Question

我正在尝试将 SQL 服务器结果转换为双重嵌套 JSON 格式。

源SQL服务器table:

ID	Name	Program	Type	Section	Director	Project	Sr Manager	PCM	Contractor	Cost Client
123	abc	qew	tyu	dd	ghghjg	hkhjk	fghfgf	gnhghj	gghgh	gghhg
456	yui	gdffgf	ghgf	jkjlkll	uiop	rtyuui	rfv	ujmk	rfvtg	efgg

转换为双 JSON，如下所示：

[
    [
    {"key":"ID","value":"123"},
    {"key":"Name","value":"abc"},
    {"key":"Program","value":"qew"},
    {"key":"Type","value":"tyu"},
    {"key":"Section","value":"dd"},
    {"key":"Director","value":"ghghjg"},
    {"key":"Project","value":"hkhjk"},
    {"key":"Sr Manager","value":"fghfgf"},
    {"key":"PCM","value":"gnhghj"},
    {"key":"Contractor","value":"gghgh"},
    {"key":"Cost Client","value":"gghhg"}
    ],
    [
    {"key":"ID","value":"456"},
    {"key":"Name","value":"yui"},
    {"key":"Program","value":"gdffgf"},
    {"key":"Type","value":"ghgfjhjhj"},
    {"key":"Section","value":"jkjlkll"},
    {"key":"Director","value":"uiop"},
    {"key":"Project","value":"rtyuui"},
    {"key":"Sr Manager","value":"rfv"},
    {"key":"PCM","value":"ujmk"},
    {"key":"Contractor","value":"rfvtg"},
    {"key":"Cost Client","value":"efgg"}
    ]
]

如有任何帮助，我们将不胜感激。

编辑：我从重写“FOR JSON AUTO”开始，这样我就可以以某种方式添加“Key”“Value”文本。但是因为我的 table 在列名中有 space，FOR XML PATH('') 根据 FOR XML 错误的要求给出了无效的 XML 标识符。那是我想到寻求社区帮助的时候。

Create PROCEDURE [dbo].[GetSQLtoJSON] @TableName VARCHAR(255)
    AS
    BEGIN
        IF OBJECT_ID(@TableName) IS NULL
            BEGIN
                SELECT Json = '';
                RETURN
            END;
    
    
        DECLARE @SQL NVARCHAR(MAX) = N'SELECT * INTO ##T ' + 
                                    'FROM ' + @TableName;
    
        EXECUTE SP_EXECUTESQL @SQL;
    
        DECLARE @X NVARCHAR(MAX) = '[' + (SELECT * FROM ##T FOR XML PATH('')) + ']';
    
    
        SELECT  @X = REPLACE(@X, '<' + Name + '>', 
                        CASE WHEN ROW_NUMBER() OVER(ORDER BY Column_ID) = 1 THEN '{'
                             ELSE '' END + Name + ':'),
                @X = REPLACE(@X, '</' + Name + '>', ','),
                @X = REPLACE(@X, ',{', '}, {'),
                @X = REPLACE(@X, ',]', '}]')
        FROM    sys.columns
        WHERE   [Object_ID] = OBJECT_ID(@TableName)
        ORDER BY Column_ID;
    
        DROP TABLE ##T;
    
        SELECT  Json = @X;
    
    END

示例数据：

CREATE TABLE [dbo].[Test1](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [Col1] [int] NOT NULL,
    [Col 2] varchar(50)
) ON [PRIMARY]
GO
SET IDENTITY_INSERT [dbo].[Test1] ON 
GO
INSERT [dbo].[Test1] ([ID], [Col1], [Col 2]) VALUES (1, 0,'ABCD')
GO
INSERT [dbo].[Test1] ([ID], [Col1] ,[Col 2]) VALUES (2, 1, 'POIU')

GO
SET IDENTITY_INSERT [dbo].[Test1] OFF
GO

Answer 1

首先检查这个link你可以找到你想要的

format-query-results-as-json-with-for-json-sql-server

但在你的情况下你可以试试这个

 SELECT 
    ID,Name,Program,Type,Section,
    Director,Project,Sr,Manager,PCM,Contractor,Cost,Client
 FROM table  
 FOR JSON AUTO;

检查 link 有更多示例，因此它可以帮助您

Answer 2

您可以使用以下代码：

在 APPLY 中，将列反透视为 key/value 对...
... 并使用 FOR JSON PATH
使用 STRING_AGG 进行另一次聚合。

SELECT '[' + STRING_AGG(CAST(v.json AS nvarchar(max)), ',') + ']'
FROM T
CROSS APPLY (
    SELECT *
    FROM (VALUES
        ('ID', CAST(ID AS nvarchar(100))),
        ('Name', Name),
        ('Program', Program),
        ('Type', [Type]),
        ('Section', Section),
        ('Director', Director),
        ('Project', Project),
        ('Sr Manager', [Sr Manager]),
        ('PCM', PCM),
        ('Contractor', Contractor),
        ('Cost Client', [Cost Client])
    ) v([key], value)
    FOR JSON PATH
) v(json)

db<>fiddle

您不能再次使用 FOR JSON，因为那样您将得到 ["json": [{"key" : ...

将结果转换为双重嵌套 JSON 格式

Convert result into doubly nested JSON format

tsql

sql-server

json

nested-json