TSQL OPENJSON 当路径有有趣的字符时

Question

我的JSON金融时间序列数据来自alphavantage

我怀疑路径标签中没有空格和句点 (.) 我会没事的。我设法使 TSQL 达到运行，而无需解析器大惊小怪，但不是路径节点数据。特殊字符是原因吗？

 DECLARE @JSON NVARCHAR(MAX)

SELECT @JSON = 
'{
    "Meta Data": {
        "1. Information": "Daily Prices (open, high, low, close) and Volumes",
        "2. Symbol": "XLK",
        "3. Last Refreshed": "2020-06-30",
        "4. Output Size": "Full size",
        "5. Time Zone": "US/Eastern"
    },
    "Time Series (Daily)": {
        "2020-06-30": {
            "1. open": "102.6600",
            "2. high": "104.9100",
            "3. low": "102.5200",
            "4. close": "104.4900",
            "5. volume": "8061852"
        },
        "2020-06-29": {
            "1. open": "101.5300",
            "2. high": "102.6600",
            "3. low": "100.3100",
            "4. close": "102.6500",
            "5. volume": "9271548"
        },
        "2020-06-26": {
            "1. open": "103.3800",
            "2. high": "103.5300",
            "3. low": "101.2300",
            "4. close": "101.5400",
            "5. volume": "22135104"
        },
        "2020-06-25": {
            "1. open": "102.4200",
            "2. high": "103.6900",
            "3. low": "101.3100",
            "4. close": "103.5800",
            "5. volume": "10265454"
        },
        "2020-06-24": {
            "1. open": "104.2000",
            "2. high": "104.7800",
            "3. low": "101.7100",
            "4. close": "102.2700",
            "5. volume": "12710857"
        },
        "2020-06-23": {
            "1. open": "104.8100",
            "2. high": "105.8300",
            "3. low": "104.4800",
            "4. close": "104.6300",
            "5. volume": "9508806"
        },
        "2020-06-22": {
            "1. open": "102.0900",
            "2. high": "103.9700",
            "3. low": "101.9300",
            "4. close": "103.8800",
            "5. volume": "7365608"
        },
        "2020-06-19": {
            "1. open": "104.1900",
            "2. high": "104.3100",
            "3. low": "101.7500",
            "4. close": "102.2400",
            "5. volume": "15638477"
        },
        "2020-06-18": {
            "1. open": "102.3000",
            "2. high": "103.0600",
            "3. low": "102.0800",
            "4. close": "102.9500",
            "5. volume": "6853710"
        },
        "2020-06-17": {
            "1. open": "103.0900",
            "2. high": "103.4600",
            "3. low": "102.3200",
            "4. close": "102.4900",
            "5. volume": "8655904"
        },
        "2020-06-16": {
            "1. open": "102.7700",
            "2. high": "103.3900",
            "3. low": "100.9200",
            "4. close": "102.5100",
            "5. volume": "13967902"
        },
        "2020-06-15": {
            "1. open": "97.6000",
            "2. high": "100.8200",
            "3. low": "97.2800",
            "4. close": "100.3700",
            "5. volume": "14961914"
        },
        "2020-06-12": {
            "1. open": "100.7700",
            "2. high": "101.2700",
            "3. low": "97.6800",
            "4. close": "99.4100",
            "5. volume": "21642002"
        },
        "2020-06-11": {
            "1. open": "102.3000",
            "2. high": "102.4500",
            "3. low": "98.1100",
            "4. close": "98.1400",
            "5. volume": "19867498"
        },
        "2020-06-10": {
            "1. open": "103.1400",
            "2. high": "104.8900",
            "3. low": "102.9500",
            "4. close": "104.1100",
            "5. volume": "12177473"
        },
        "2020-06-09": {
            "1. open": "101.4100",
            "2. high": "102.9000",
            "3. low": "101.3200",
            "4. close": "102.4000",
            "5. volume": "7352624"
        },
        "2020-06-08": {
            "1. open": "101.2300",
            "2. high": "101.9600",
            "3. low": "100.3000",
            "4. close": "101.9200",
            "5. volume": "8064775"
        },
        "2020-06-05": {
            "1. open": "99.5100",
            "2. high": "101.7000",
            "3. low": "99.3400",
            "4. close": "101.4100",
            "5. volume": "10374918"
        }
    }
}
'



    SELECT 
           *
    FROM OPENJSON(@JSON,'$."Time Series (Daily)"') 
    WITH(   

            series_open VARCHAR(18) '$."1. open"',
            searies_high VARCHAR(128) '$."2. high"',
            series_close VARCHAR(128) '$."4. close"',
            searies_volumn VARCHAR(28) '$."5. volume"'

          )

很高兴拥有：为整个集合重复的元数据为路径中的 5 个子节点中的每一个重复日期。

感谢专家！

Answer 1

以下内容足以让您自行解决此问题：

你的JSON（减少到只有一些节点）：

DECLARE @JSON NVARCHAR(MAX)=
N'{
    "Meta Data": {
        "1. Information": "Daily Prices (open, high, low, close) and Volumes",
        "2. Symbol": "XLK",
        "3. Last Refreshed": "2020-06-30",
        "4. Output Size": "Full size",
        "5. Time Zone": "US/Eastern"
    },
    "Time Series (Daily)": {
        "2020-06-30": {
            "1. open": "102.6600",
            "2. high": "104.9100",
            "3. low": "102.5200",
            "4. close": "104.4900",
            "5. volume": "8061852"
        },
        "2020-06-29": {
            "1. open": "101.5300",
            "2. high": "102.6600",
            "3. low": "100.3100",
            "4. close": "102.6500",
            "5. volume": "9271548"
        },
        "2020-06-26": {
            "1. open": "103.3800",
            "2. high": "103.5300",
            "3. low": "101.2300",
            "4. close": "101.5400",
            "5. volume": "22135104"
        }
    }
}'

--查询

SELECT JSON_VALUE(A.[Meta Data],'$."1. Information"') AS Meta_Information
      ,JSON_VALUE(A.[Meta Data],'$."2. Symbol"') AS Meta_Symbol
      ,JSON_VALUE(A.[Meta Data],'$."3. Last Refreshed"') AS Meta_LastRefreshed
      ,JSON_VALUE(A.[Meta Data],'$."4. Output Size"') AS Meta_OutputSize
      ,JSON_VALUE(A.[Meta Data],'$."5. Time Zone"') AS Meta_TimeZone
      ,B.[key] AS Data_Date
      ,C.*
FROM OPENJSON(@JSON) WITH([Meta Data]           NVARCHAR(MAX) AS JSON
                         ,[Time Series (Daily)] NVARCHAR(MAX) AS JSON ) A
CROSS APPLY OPENJSON(A.[Time Series (Daily)]) B
CROSS APPLY OPENJSON(B.[value]) WITH([1. open] DECIMAL(10,4)
                                    ,[2. high] DECIMAL(10,4)
                                    --and so on
                                    ) C;

简而言之：

我们将 OPENJSON() 与 WITH 子句一起使用以获得第一级（Meta 和 Time Series）。
我们使用 AS JSON 来告诉引擎，结果仍然是 JSON 而不是简单的文本。
现在我们可以使用 JSON_VALUE() 直接读取元数据（这也可以直接对 @JSON 起作用）。
我们可以再次使用 OPENJSON() 进行更深入的研究。
用描述性的部分作为内容是个坏习惯。实际上，实际上是日期值的键最好是同名的，并在对象中携带日期……不过我们可以使用 OPENJSON 而没有 WITH 子句检索 key（= 日期）和 value（= 对象）列。
另一个 OPENJSON() 获取 value 作为输入并将 return 内部值。

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