从Azure SQL中非常嵌套的JSON中提取数据

Question

我已嵌套JSON文件：

"vehicleStatusResponse": {
    "vehicleStatuses": [
        {
            "vin": "ABC1234567890",
            "triggerType": {
                "triggerType": "TIMER",
                "context": "RFMS",
                "driverId": {
                    "tachoDriverIdentification": {
                        "driverIdentification": "123456789",
                        "cardIssuingMemberState": "BRA",
                        "driverAuthenticationEquipment": "CARD",
                        "cardReplacementIndex": "0",
                        "cardRenewalIndex": "1"
                    }
                }
            },
            "receivedDateTime": "2020-02-12T04:11:19.221Z",
            "hrTotalVehicleDistance": 103306960,
            "totalEngineHours": 3966.6216666666664,
            "driver1Id": {
                "tachoDriverIdentification": {
                    "driverIdentification": "BRA1234567"
                }
            },
            "engineTotalFuelUsed": 48477520,
            "accumulatedData": {
                "durationWheelbaseSpeedOverZero": 8309713,
                "distanceCruiseControlActive": 8612200,
                "durationCruiseControlActive": 366083,
                "fuelConsumptionDuringCruiseActive": 3064170,
                "durationWheelbaseSpeedZero": 5425783,
                "fuelWheelbaseSpeedZero": 3332540,
                "fuelWheelbaseSpeedOverZero": 44709670,
                "ptoActiveClass": [
                    {
                        "label": "wheelbased speed >0",
                        "seconds": 16610,
                        "meters": 29050,
                        "milliLitres": 26310
                    },
                    {
                        "label": "wheelbased speed =0",
                        "seconds": 457344,
                        "milliLitres": 363350

它已经从Azure BLOB存储导入到SQL DB，现在我需要从中提取数据到表。我已经使用了T-SQL请求来执行此操作，但是它返回了只有标头的空白表：

SELECT response.*
    FROM OPENROWSET (BULK 'response3.json', DATA_SOURCE = 'VCBI24', SINGLE_CLOB) as j
    CROSS APPLY OPENJSON(BulkColumn)
    WITH ( vehiclestatusResponse nvarchar (100), vehicleStatuses nvarchar (100), vin nvarchar (100), triggerType nvarchar (100), context nvarchar (100) and etc...) AS response 

我该如何处理？

非常感谢您的关注！

Answer 1

您可以提供带有OPENJSON的路径，该路径允许您深入到嵌套的JSON，例如

SELECT *
FROM OPENJSON( @json, '$.vehicleStatusResponse.vehicleStatuses' )
WITH (
    vin VARCHAR(50)  '$.vin',
    triggerType VARCHAR(50)  '$.triggerType.triggerType',
    context VARCHAR(50)  '$.triggerType.context',
    driverIdentification VARCHAR(50)     '$.triggerType.driverId.tachoDriverIdentification.driverIdentification',
    cardIssuingMemberState VARCHAR(50)   '$.triggerType.driverId.tachoDriverIdentification.cardIssuingMemberState',

    receivedDateTime DATETIME    '$.receivedDateTime',

    engineTotalFuelUsed INT  '$.engineTotalFuelUsed'

    )

完整脚本示例：
DECLARE @json VARCHAR(MAX) = '{
"vehicleStatusResponse": {
  "vehicleStatuses": [
    {
      "vin": "ABC1234567890",
      "triggerType": {
        "triggerType": "TIMER",
        "context": "RFMS",
        "driverId": {
          "tachoDriverIdentification": {
            "driverIdentification": "123456789",
            "cardIssuingMemberState": "BRA",
            "driverAuthenticationEquipment": "CARD",
            "cardReplacementIndex": "0",
            "cardRenewalIndex": "1"
          }
        }
      },
      "receivedDateTime": "2020-02-12T04:11:19.221Z",
      "hrTotalVehicleDistance": 103306960,
      "totalEngineHours": 3966.6216666666664,
      "driver1Id": {
        "tachoDriverIdentification": {
          "driverIdentification": "BRA1234567"
        }
      },
      "engineTotalFuelUsed": 48477520,
      "accumulatedData": {
        "durationWheelbaseSpeedOverZero": 8309713,
        "distanceCruiseControlActive": 8612200,
        "durationCruiseControlActive": 366083,
        "fuelConsumptionDuringCruiseActive": 3064170,
        "durationWheelbaseSpeedZero": 5425783,
        "fuelWheelbaseSpeedZero": 3332540,
        "fuelWheelbaseSpeedOverZero": 44709670,
        "ptoActiveClass": [
          {
            "label": "wheelbased speed >0",
            "seconds": 16610,
            "meters": 29050,
            "milliLitres": 26310
          },
          {
            "label": "wheelbased speed =0",
            "seconds": 457344,
            "milliLitres": 363350
          }
        ]
      }
    }
  ]
}}}}}}}}'


SELECT *
FROM OPENJSON( @json, '$.vehicleStatusResponse.vehicleStatuses' )
WITH (
    vin VARCHAR(50)  '$.vin',
    triggerType VARCHAR(50)  '$.triggerType.triggerType',
    context VARCHAR(50)  '$.triggerType.context',
    driverIdentification VARCHAR(50)     '$.triggerType.driverId.tachoDriverIdentification.driverIdentification',
    cardIssuingMemberState VARCHAR(50)   '$.triggerType.driverId.tachoDriverIdentification.cardIssuingMemberState',

    receivedDateTime DATETIME    '$.receivedDateTime',

    engineTotalFuelUsed INT  '$.engineTotalFuelUsed'


    )

我的结果：
在此处阅读有关OPENJSON的更多信息：
https://docs.microsoft.com/en-us/sql/t-sql/functions/openjson-transact-sql?view=sql-server-ver15