如何将JSON从文件加载到SQL Server 2016？

我正在尝试将数据从JSON格式移动到SQl Server。我正在使用SQL Server 2016，因为此版本支持使用OPENROWSET导入JSON数据

我正在使用下面的查询/导入数据，但我需要一些解析内容的帮助。下面是我的查询和我试图移动到DB的JSON示例文件

质疑

 SELECT value
 FROM OPENROWSET (BULK 'C:\temp\temp.json', SINGLE_CLOB) as j
 CROSS APPLY OPENJSON(BulkColumn)

对于上面的内容，我得到了两行结果，其中第一行是一些我不需要的信息。我想知道，我如何才能只选择我的第二排

这是JSON文件

{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2016-05-28",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1540390
    }
  },


  "results": [
    {
      "manufacturer_contact_zip_ext": "",
      "manufacturer_g1_address_2": "",
      "event_location": "",
      "report_to_fda": "Y",
      "manufacturer_contact_t_name": "",
      "manufacturer_contact_state": "",
      "manufacturer_link_flag": "Y",
      "manufacturer_g1_city": "ZUG",
      "manufacturer_contact_address_2": "",
      "event_type": "Malfunction",
      "manufacturer_contact_pcity": "",
      "manufacturer_contact_address_1": "GUBELSTRASSE 34",
      "report_number": "3008382007-2012-09245",
      "type_of_report": [
        "Initial submission"
      ],
      "product_problem_flag": "Y",
      "date_received": "20130101",
      "manufacturer_address_2": "",
      "reprocessed_and_reused_flag": "N",
      "manufacturer_address_1": "",
      "manufacturer_contact_zip_code": "6300",
      "manufacturer_contact_plocal": "",
      "reporter_occupation_code": "PATIENT",
      "manufacturer_contact_l_name": "WANDOLSKI",
      "source_type": [
        "Consumer"
      ],
      "distributor_zip_code_ext": "",
      "manufacturer_g1_postal_code": "6300",
      "manufacturer_g1_state": "",
      "date_facility_aware": "20121210",
      "manufacturer_contact_area_code": "",
      "manufacturer_contact_f_name": "YANNICK",
      "previous_use_code": "I",
      "device": [
        {
          "manufacturer_d_address_1": "GUBELSTRASSE 34",
          "manufacturer_d_address_2": "",
          "device_event_key": "",
          "device_sequence_number": " 1.0",
          "manufacturer_d_state": "",
          "manufacturer_d_zip_code": "6300",
          "manufacturer_d_city": "ZUG",
          "lot_number": "3180296",
          "manufacturer_d_postal_code": "6300",
          "manufacturer_d_zip_code_ext": "",
          "model_number": "",
          "date_received": "20130101",
          "device_report_product_code": "NBW",
          "device_operator": "LAY USER/PATIENT",
          "device_availability": "No",
          "other_id_number": "",
          "generic_name": "GLUCOSE MONITORING SYS/KIT",
          "manufacturer_d_name": "LIFESCAN EUROPE, A DIVISION OF CILAG GMBH INTL",
          "manufacturer_d_country": "SZ",
          "brand_name": "OT ULTRALINK METER",
          "openfda": {
            "device_name": "System, Test, Blood Glucose, Over The Counter",
            "medical_specialty_description": "Clinical Chemistry",
            "device_class": "2",
            "regulation_number": "862.1345"
          },
          "device_age_text": "",
          "device_evaluated_by_manufacturer": "R",
          "catalog_number": "",
          "implant_flag": "",
          "date_removed_flag": ""
        }
      ],
      "manufacturer_zip_code": "",
      "manufacturer_contact_country": "SZ",
      "health_professional": "N",
      "manufacturer_g1_zip_code_ext": "",
      "manufacturer_city": "",
      "manufacturer_contact_extension": "",
      "manufacturer_contact_phone_number": "",
      "patient": [
        {
          "sequence_number_treatment": [
            ""
          ],
          "patient_sequence_number": "1",
          "date_received": "20130101",
          "sequence_number_outcome": [
            ""
          ]
        }
      ],
      "distributor_city": "",
      "distributor_state": "",
      "date_report": "20121210",
      "initial_report_to_fda": "Unknown",
      "manufacturer_g1_country": "SZ",
      "event_key": "",
      "manufacturer_contact_city": "ZUG",
      "mdr_report_key": "2891923",
      "removal_correction_number": "",
      "number_devices_in_event": "",
      "date_manufacturer_received": "20121210",
      "manufacturer_name": "",
      "report_source_code": "Manufacturer report",
      "remedial_action": [
        ""
      ],
      "manufacturer_g1_zip_code": "6300",
      "manufacturer_zip_code_ext": "",
      "report_to_manufacturer": "",
      "manufacturer_g1_name": "LIFESCAN EUROPE, A DIVISION OF CILAG GMBH INTL",
      "distributor_address_1": "",
      "adverse_event_flag": "N",
      "manufacturer_state": "",
      "distributor_address_2": "",
      "manufacturer_postal_code": "",
      "manufacturer_country": "",
      "single_use_flag": "N",
      "mdr_text": [
        {
          "mdr_text_key": "16750885",
          "text_type_code": "Description of Event or Problem",
          "patient_sequence_number": "1",
          "text": "ON (B)(6) 2012, THE LAY USER/ PATIENT CONTACTED LIFESCAN (LFS) IN USA ALLEGING AN ER 2 ISSUE. THE PATIENT DID NOT ALLEGE ANY HARM OR INJURY DUE TO THE ALLEGED ISSUE. THE ALLEGED ISSUE WAS NOT RESOLVED WITH TROUBLESHOOTING. BASED ON THE INFORMATION PROVIDED, THERE IS NO INDICATION THAT THE REPORTED ISSUE CAUSED OR CONTRIBUTED TO A SERIOUS INJURY. THE PATIENT DID NOT DEVELOP SYMPTOMS SUGGESTIVE OF SEVERE HYPOGLYCEMIA OR HYPERGLYCEMIA, NOR RECEIVE MEDICAL INTERVENTION FOR EITHER OF THESE CONDITIONS. HOWEVER, THIS COMPLAINT IS BEING REPORTED BECAUSE THE ALLEGED PRODUCT ISSUE REMAINED UNRESOLVED."
        }
      ],
      "number_patients_in_event": "",
      "distributor_name": "",
      "manufacturer_g1_address_1": "GUBELSTRASSE 34",
      "distributor_zip_code": "",
      "manufacturer_contact_exchange": "",
      "manufacturer_contact_postal_code": "6300",
      "manufacturer_contact_pcountry": ""
    }
  ]
}

---

当你们说第二行时，我假设你们想要结果对象中的数据。OPENJSON仅在输入对象的第一级为输入中找到的每个key:value对返回一行。在您的例子中，有两个对象，一个在meta键下，另一个在results键下

您可以使用[key]列筛选第二行：

SELECT value
FROM OPENROWSET (BULK 'C:\temp\temp.json', SINGLE_CLOB) as j
CROSS APPLY OPENJSON(BulkColumn)
WHERE [key] = 'results'

或者，您可以在路径$.result中查找JSON并获取此对象中的所有节点：

SELECT value
FROM OPENROWSET (BULK 'C:\temp\temp.json', SINGLE_CLOB) as j
CROSS APPLY OPENJSON(BulkColumn, '$.results')

也许您还可以看看OPENJSON WITH schema，它可以帮助您将JSON对象中的节点转换为单元格，例如：

SELECT *
FROM OPENROWSET (BULK 'C:\temp\temp.json', SINGLE_CLOB) as j
CROSS APPLY OPENJSON(BulkColumn, '$.results')
WITH (report_number nvarchar(400), date_received nvarchar(400),device nvarchar(max) AS JSON)

如果将NVARCHARMAX指定为JSON作为返回类型，则可以提取JSON片段，例如示例中的设备数组。 如果您需要从内部数组（例如设备）获取一些信息，您可以使用第二个OPENJSON打开该JSON数组，并从内部表获取信息，例如：

SELECT *
FROM OPENROWSET (BULK 'C:\temp\temp.json', SINGLE_CLOB) as j
CROSS APPLY OPENJSON(BulkColumn, '$.results')
WITH (report_number nvarchar(400), date_received nvarchar(400),device nvarchar(max) AS JSON)
     CROSS APPLY OPENJSON(device) WITH (lot_number int)

---

谢谢，这正是我要找的！但是我如何请求嵌套列的数据，例如：如果我只需要上面的设备信息中的lotnumber，那么JSONI已经用新的示例更新了答案。我希望这就是你需要的。是的！再次感谢在您达到json的最深层次之后，您将如何提升该层次？