如何获得此 JSON 输出？答案

【问题标题】：How do I get this JSON output?如何获得此 JSON 输出？
【发布时间】：2020-05-25 21:34:29
【问题描述】：

我需要从 SQL Server 2016 创建以下 JSON。

{
    "recipientList": [
        {
            "name": "1",
            "recipientType": "User"
        },
        {
            "name": "2",
            "recipientType": "User"
        }
    ],
    "from": "Admin",
    "creationUtcDate": "2015-04-30T12:30:18.701Z",
    "content": "Test Message"
}

我尝试了使用 JSON AUTO、JSON PATH 和 ROOT 的 SQL 查询，如下所示，但它们都没有得到我想要的输出。

DECLARE @recipientList TABLE ([name] varchar(50), [recipientType] VARCHAR(50), [From] VARCHAR(500), [creationUtcDate] DATETIME, [content] VARCHAR(8000))
INSERT INTO @recipientList
SELECT '1', 'User', 'Admin', GETUTCDATE(), 'Test Message'
union
SELECT '2', 'User', 'Admin', GETUTCDATE(), 'Test Message'


SELECT r.[name], r.[recipientType], r.[From], r.creationUtcDate, r.content
FROM @recipientList r
FOR JSON PATH, ROOT ('recipientList')

当前结果：

{
    "recipientList": [
        {
            "name": "1",
            "recipientType": "User",
            "From": "Admin",
            "creationUtcDate": "2020-05-26T01:16:18.690",
            "content": "Test Message"
        },
        {
            "name": "2",
            "recipientType": "User",
            "From": "Admin",
            "creationUtcDate": "2020-05-26T01:16:18.690",
            "content": "Test Message"
        }
    ]
}

任何帮助都非常值得赞赏..

【问题讨论】：

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标签： sql json sql-server sql-server-2016

【解决方案1】：

你可以试试这个查询：

select distinct
  (select [name], recipientType from test for json path) recipientList,
  [from],
  creationUtcDate,
  content
from test t
for json path;

示例

create table test (
  [name] varchar(50),
  [recipientType] VARCHAR(50),
  [From] VARCHAR(500),
  [creationUtcDate] DATETIME,
  [content] VARCHAR(8000)
);

INSERT INTO test values 
('1', 'User', 'Admin', GETUTCDATE(), 'Test Message'),
('2', 'User', 'Admin', GETUTCDATE(), 'Test Message');

https://dbfiddle.uk/?rdbms=sqlserver_2016&fiddle=88bc66da55ff918b6550dd738aecb244

结果

[
  {
    "recipientList": [
      {
        "name": "1",
        "recipientType": "User"
      },
      {
        "name": "2",
        "recipientType": "User"
      }
    ],
    "from": "Admin",
    "creationUtcDate": "2020-05-26T01:48:26.447",
    "content": "Test Message"
  }
]

坦率地说，直到看到下面的示例，我才知道该怎么做：

【讨论】：

太棒了，这正是我所需要的，只是添加了 WITHOUT_ARRAY_WRAPPER 以使其完全一样。