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我正在尝试将 JSON 列中的数据与表中的其他数据一起取消嵌套到单独的行中。这是我目前所拥有的......

Select 
  *, 
  items 
from 
  project.mytable as libraries, 
  unnest ( libraries.items )

This is the JSON in the "items" column:
     {
      "254718f4-e4f4-40b2-83fd-24ca0c7d96b6": {
        "createdAt": "2020-03-23T18:57:06.820Z",
        "id": "254718f4-e4f4-40b2-83fd-24ca0c7d96b6",
        "parameters": {
          "name": "Access Topics (Webex)",
          "resourceId": "96fae4ec-a448-440b-8faa-badba789417a",
          "type": "video"
        },
        "type": "Resource",
        "updatedAt": "2020-03-23T18:57:06.820Z"
      },
      "32a1084c-1cdf-4d15-b438-a3b79310d467": {
        "createdAt": "2020-03-23T04:57:51.656Z",
        "id": "32a1084c-1cdf-4d15-b438-a3b79310d467",
        "parameters": {
          "name": "Launch Update.mp4",
          "resourceId": "993dad8f-6e3c-466b-81d6-25ef5df2fcb1",
          "type": "video"
        },
        "type": "Resource",
        "updatedAt": "2020-03-23T04:57:51.655Z"
      }
    }

您如何取消 json 的根项，以便您可以单独定位字段并将它们保存为 BQ 表中的字段？

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