在SQL Server中查询JSON密钥名称 [英] Querying json key name in SQL Server
问题描述
像这样给出json ...
Given json like this...
{"setting1":"A","setting2":"B","setting3":"C"}
我希望看到类似...的结果
I would like to see results like...
+----------+-------+
| name | value |
+----------+-------+
| setting1 | A |
| setting2 | B |
| setting3 | C |
+----------+-------+
我的难题是我试图找出如何提取密钥的名称(即"setting1","setting2","setting3"等)
My struggle is I'm trying to find out how to extract the key's name (i.e., "setting1", "setting2", "setting3", etc.)
我可以执行类似以下查询的操作,但是我不知道会有多少个设置以及它们的名称是什么,所以我想要更动态的东西.
I could do something like the following query, but I don't know how many settings there will be and what their names will be, so I'd like something more dynamic.
SELECT
B.name,
B.value
FROM OPENJSON(@json) WITH
(
setting1 varchar(50) '$.setting1',
setting2 varchar(50) '$.setting2',
setting3 varchar(50) '$.setting3'
) A
CROSS APPLY
(
VALUES
('setting1', A.setting1),
('setting2', A.setting2),
('setting3', A.setting3)
) B (name, value)
使用XML,我可以做一些简单的事情:
With XML, I could do something simple like this:
DECLARE @xml XML = '<settings><setting1>A</setting1><setting2>B</setting2><setting3>C</setting3></settings>'
SELECT
A.setting.value('local-name(.)', 'VARCHAR(50)') name,
A.setting.value('.', 'VARCHAR(50)') value
FROM @xml.nodes('settings/*') A (setting)
有什么方法可以做与SQL Server的json功能类似的事情?
Any way to do something similar with SQL Server's json functionality?
推荐答案
Aaron Bertrand has written about json key value in Advanced JSON Techniques
SELECT x.[Key], x.[Value]
FROM OPENJSON(@Json, '$') AS x;
返回
Key Value
------------------
setting1 A
setting2 B
setting3 C
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